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This article is about the number 53. For the year, see
53.
Fifty-three is a number. It comes between fifty-two and fifty-four, and is an odd number. It is also the 16th prime number, after 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, and 47.