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'33' ('thirty-three') is the natural number following 32 and preceding 34.

Cardinal	33 thirty-three
Ordinal	33rd thirty-third
Factorization	$3cdot\; 11$
Divisors	1, 3, 11, 33
Roman numeral	XXXIII
Binary	100001
Hexadecimal	21

Contents

In mathematics

In science

Astronomy

In religion

In sports

In other fields

Historical years

References

In mathematics

33 is the largest positive integer that can not be expressed as a sum of different triangular numbers. It is also the smallest odd repdigit that's not prime (unless we consider 1-digit integers to also be repdigits).
33 is the eighth distinct biprime comprising the prime factors (3.11). Its aliquot sum is 15; itself a discrete biprime (3.5) in the following Aliquot sequence 33,15,9,4,3,1,0. (Note 33 is the 8th composite number to descend into the prime number 3, the others outside of this sequence being 30,26,16,12)
The sum of the first four factorials is 33. Adding up the sums of divisors for the 1 through 6 yields 33. 33 is the smallest integer such that it and the next two integers all have the same number of divisors.
It is also the first member of the first cluster of three biprimes (33,34,35); the next such cluster is (85,86,87).

In science

★ The atomic number of arsenic

Astronomy

★ Messier object M33, a magnitude 7.0 galaxy in the constellation Triangulum, also known as the Triangulum Galaxy.

★ The New General Catalogue object NGC 33, a double star in the constellation Pisces

★ The Saros number of the solar eclipse series which began on -1982 August 2 and ended on -485 January 17. The duration of Saros series 33 was 1496.5 years, and it contained 84 solar eclipses.

★ The Saros number of the lunar eclipse series which began on -1662 May 22 and ended on -364 July 10. The duration of Saros series 33 was 1298.1 years, and it contained 73 lunar eclipses.

In religion

★ Lag Ba'omer is a minor Jewish holiday which falls on the 33rd day of the Omer

★ Jesus's age when he was crucified in 33 A.D., according to many, though not verified historically.

In sports

★ The number of innings played in the longest baseball game in history (a 1981 minor league game between the Rochester Red Wings and the Pawtucket Red Sox in Pawtucket, Rhode Island).

★ Retired numbers of former basketball star Larry Bird, Kareem Abdul-Jabbar, and former baseball star Eddie Murray.

★ Number of retired hockey goalie Patrick Roy.

★ Jersey number of basketball player Patrick Ewing. The number was retired on February 28, 2003 by the New York Knicks.

★ Jersey number of basketball player Scottie Pippen. The number was retired on December 9, 2005 by the Chicago Bulls.

★ Jersey number of basketball player Alonzo Mourning.

★ Jersey number of retired baseball star José Canseco.

★ Jersey number of Kobe Bryant when he was in High School

★ Name and lucky number of the Danish flag football team Odense 33

★ Jersey number of Tony Dorsett (Running back for the Dallas Cowboys and Denver Broncos)

★ Scott Wimmer's Nextel Cup Series number for Richard Childress Racing sponsored by Holiday Inn

In other fields

'Thirty-three' is:

★ Alexander the Great died at the age of thirty-three

★ On most occasions, the traditional number of racers in the Indianapolis 500

★ In reference to gramophone records, 33 refers to a type of record by its revolution speed of 33⅓ revolutions per minute. 33s are also known as long playing records, or LPs. See: 78 and 45

★ Many people claim that they see, witness, or experience the number 33 in unusual circumstances or at a frequency that defies statistical likelihood. A popular website is dedicated to this digit

★ The best-known car number of retired NASCAR driver Harry Gant

★ A significant number in modern numerology, one of the master numbers along with 11 and 22

★ A song by the Smashing Pumpkins on their Mellon Collie and the Infinite Sadness album. Also a song by Coheed and Cambria on their The Second Stage Turbine Blade album (the songs are not related)

★ The title of the first episode of the new ''Battlestar Galactica'' television series

★ In Spanish, the "smile to the camera" word, as is "cheese" in English. ''Diga treinta y tres'' ("Say thirty-three") is the same as "Say cheese"

★ In French, Italian, Romanian, Spanish and Portuguese, the word a patient is usually asked to say when a doctor is listening to his or her lungs with a stethoscope (''Trente-Trois'', ''Trentatrè'', ''Treizeci şi trei'', ''Treinta y Tres'' and ''Trinta e Três'')

★ In Bill & Ted's Bogus Journey, the title characters live at apartment number 33.

★ In Life on Mars (TV series), the central character Sam finds himself 33 years in the past for the duration of the show.

★ The code for international direct-dial phone calls to France

★ A normal human spine has 33 vertebrae when the bones that form the coccyx are counted individually

★ The number printed on all Rolling Rock beer labels

★ The number of chapters per series of DarkSoul Kingdom, an online fantasy story

★ Number of Cantos in each of Dante's 3 parts of ''The Divine Comedy''

★ Number of maximum European Credit Transfer and Accumulation System credits that Instituto Superior Técnico's students are allowed to achieve throughout one semester

★ In music : http://www.thirty-three.be : a Belgian rockband who devoted their music to the sacred number 33.

★ 33 is a street code name for Cocaine.

★ The namesake of the private club, Club 33, located in Disneyland's New Orleans Square.

★ The Scottish Rite of Freemasonry has 33 degrees.

★ Number of victims, including the suspect that were all killed at Virginia Tech, April 16, 2007.

★ There are 330 ml of alcohol in an alcohol beverage according to the LCBO commercial - and "330 brands"

Historical years

'33 A.D.', 33 B.C., 1933, 2033, etc.

References

★ Prime Curios! 33 from the Prime Pages