In mathematics 33 is:
the largest positive integer that cannot be expressed as a sum of different triangular numbers.
the smallest odd repdigit that is not a prime number.
the sum of the first four positive factorials.
the sum of the sum of the divisors of the first 6 positive integers.
equal to the sum of the squares of the digits of its own square in bases 9, 16 and 31.
the smallest integer such that it and the next two integers all have the same number of divisors.
the first member of the first cluster of three semiprimes (33, 34, 35); the next such cluster is 85, 86, 87.
In science
The atomic number of arsenic
A normal human spine has 33 vertebrae when the bones that form the coccyx are counted individually
33 is, according to the Newton scale, the temperature at which water boils.
In religion and mythology
The number of deities in the Vedic Religion is 33.
The second level of heaven in Buddhism is named Tr?yastri??a, meaning "of the 33 (gods)."
The number of incarnations the bodhisattva Avalokite?vara is said to embody
The divine name Elohim appears 33 times in the story of creation in the opening chapters of Genesis.[2]
Lag Ba'omer is a minor Jewish holiday which falls on the 33rd day of the Omer
Jesus' traditional age when he was crucified and resurrected.[3]
According to Al-Ghazali the dwellers of Heaven will exist eternally in a state of being age 33.[4]
Islamic prayer beads are generally arranged in sets of 33, corresponding to the widespread use of this number in dhikr rituals. Such beads may number thirty-three in total or three distinct sets of thirty-three for a total of ninety-nine, corresponding to the names of God.
Pope John Paul I, the 33-day pope. One of the shortest reigns in papal history, and it resulted in the most recent 3-pope year.
A religious image of the Virgin Mary from the 18th century is known in Uruguay as "Virgen de los Treinta y Tres" (Virgin of the Thirty-Three); it was consecrated by Pope John Paul II in his visit to Uruguay in 1988.
There are several churches dedicated to this Marian devotion, being the most important the Cathedral Basilica of Our Lady of the Thirty-Three in Florida, Uruguay.
There are 33 degrees in Scottish Rite Freemasonry
The House of the Temple, Home of The Supreme Council, 33�, Ancient & Accepted Scottish Rite of Freemasonry in Washington D.C., USA has 33 outer columns which are each 33 feet high.
The Saigoku Kannon Pilgrimage visits thirty-three buddhist temples throughout the Kansai region of Japan.
Rupes Nigra, a phantom island was described as having a circumference of 33 "French" miles.
In other fields Thirty-three is:
A significant number in modern numerology, one of the master numbers along with 11 and 22.
The number printed on all Rolling Rock beer labels.
Pabst Blue Ribbon Beer used to be advertised as "Blended 33 to 1".
The namesake of the private club, Club 33, located in Disneyland's New Orleans Square.
The number of workers trapped, all of whom were rescued, during the 2010 Copiap� mining accident.
One of the symbols of Ku Klux Klan. (K is the 11th letter of the alphabet; 3 times 11 is 33, KKK).
The 33 Orientales were a group of Uruguay's national Independence Heroes that liberate the country in 1825 from the Brazilian Empire, the name is due for the leaders all 33 Degree Masons (The Thirty-Three Orientals), one of Uruguay's national states and its capital city is named "Treinta y Tres" after them
+33 is the code for international direct-dial phone calls to France.