51656886 has 32 divisors (see below), whose sum is σ = 115164000. Its totient is φ = 17163360.

The previous prime is 51656861. The next prime is 51656903. The reversal of 51656886 is 68865615.

51656886 is a `hidden beast` number, since 5 + 1 + 6 + 568 + 86 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17476 + ... + 20216.

It is an arithmetic number, because the mean of its divisors is an integer number (3598875).

Almost surely, 2^51656886 is an apocalyptic number.

51656886 is an abundant number, since it is smaller than the sum of its proper divisors (63507114).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51656886 is a wasteful number, since it uses less digits than its factorization.

51656886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3101 (or 3095 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The square root of 51656886 is about 7187.2725007474. The cubic root of 51656886 is about 372.4283567155.

The spelling of 51656886 in words is "fifty-one million, six hundred fifty-six thousand, eight hundred eighty-six".