51656624 has 20 divisors (see below), whose sum is σ = 101782920. Its totient is φ = 25390080.

The previous prime is 51656623. The next prime is 51656641. The reversal of 51656624 is 42665615.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (51656621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26417 + ... + 28304.

It is an arithmetic number, because the mean of its divisors is an integer number (5089146).

Almost surely, 2^51656624 is an apocalyptic number.

It is an amenable number.

51656624 is a deficient number, since it is larger than the sum of its proper divisors (50126296).

51656624 is a wasteful number, since it uses less digits than its factorization.

51656624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54788 (or 54782 counting only the distinct ones).

The product of its digits is 43200, while the sum is 35.

The square root of 51656624 is about 7187.2542740604. The cubic root of 51656624 is about 372.4277270712.

The spelling of 51656624 in words is "fifty-one million, six hundred fifty-six thousand, six hundred twenty-four".