56551916 has 12 divisors (see below), whose sum is σ = 99622320. Its totient is φ = 28088400.

The previous prime is 56551909. The next prime is 56551921. The reversal of 56551916 is 61915565.

It is a happy number.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 56551916.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46211 + ... + 47418.

It is an arithmetic number, because the mean of its divisors is an integer number (8301860).

Almost surely, 2^56551916 is an apocalyptic number.

It is an amenable number.

56551916 is a deficient number, since it is larger than the sum of its proper divisors (43070404).

56551916 is a wasteful number, since it uses less digits than its factorization.

56551916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93784 (or 93782 counting only the distinct ones).

The product of its digits is 40500, while the sum is 38.

The square root of 56551916 is about 7520.1007971968. The cubic root of 56551916 is about 383.8390076724.

The spelling of 56551916 in words is "fifty-six million, five hundred fifty-one thousand, nine hundred sixteen".