55963281 has 16 divisors (see below), whose sum is σ = 81607680. Its totient is φ = 33831120.

The previous prime is 55963241. The next prime is 55963307. The reversal of 55963281 is 18236955.

It is not a de Polignac number, because 55963281 - 2⁶ = 55963217 is a prime.

It is a super-2 number, since 2×55963281² = 6263777640569922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55963241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12556 + ... + 16418.

It is an arithmetic number, because the mean of its divisors is an integer number (5100480).

Almost surely, 2^55963281 is an apocalyptic number.

It is an amenable number.

55963281 is a deficient number, since it is larger than the sum of its proper divisors (25644399).

55963281 is a wasteful number, since it uses less digits than its factorization.

55963281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4316.

The product of its digits is 64800, while the sum is 39.

The square root of 55963281 is about 7480.8609798605. The cubic root of 55963281 is about 382.5025981284.

The spelling of 55963281 in words is "fifty-five million, nine hundred sixty-three thousand, two hundred eighty-one".