Fatto generale: 52 is the number of cards in a standard deck of playing cards, not counting Jokers or advertisement cards.
Fatto matematico: 52 is the 5^{th} Bell number.
Trivia: 52 is the number of letters in the English alphabet, if majuscules are distinguished from minuscules.
Data storica: February 21st is the day in 1965 that Malcolm X is assassinated at the Audubon Ballroom in New York City by members of the Nation of Islam.