52

52 is the natural number that follows 51 and precedes 53. In mathematics, it is an even composite number with prime factorization 4 × 13. It has six divisors: 1, 2, 4, 13, 26, and 52. In Roman numerals it is written as LII; in binary as 110100; in hexadecimal as 0x34; in octal as 64.

In calendar terms, there are 52 weeks in a common year, roughly 364 days, leaving one or two days outside depending on leap years and the week-numbering system used. Some calendars designate 53 weeks in certain years.

In playing cards, a standard deck contains 52 cards, derived from four suits with 13 ranks. The deck is central to many card games, probability calculations, and magic tricks.

In science, element 52 is tellurium (Te), a brittle metalloid used in alloys and in semiconductor applications. It was named after tellus, the Latin word for Earth.

In music, a standard piano has 52 white keys, accompanied by 36 black keys, for a total of 88 keys.

In computing and encoding, the decimal value 52 corresponds to the ASCII character '4'.