51365568 has 56 divisors (see below), whose sum is σ = 143908272. Its totient is φ = 16113664.

The previous prime is 51365557. The next prime is 51365581. The reversal of 51365568 is 86556315.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4605 + ... + 11132.

Almost surely, 2^51365568 is an apocalyptic number.

It is an amenable number.

51365568 is an abundant number, since it is smaller than the sum of its proper divisors (92542704).

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

51365568 is a wasteful number, since it uses less digits than its factorization.

51365568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15769 (or 15759 counting only the distinct ones).

The product of its digits is 108000, while the sum is 39.

The square root of 51365568 is about 7166.9776056578. The cubic root of 51365568 is about 371.7269356930.

The spelling of 51365568 in words is "fifty-one million, three hundred sixty-five thousand, five hundred sixty-eight".