51564696 has 16 divisors (see below), whose sum is σ = 128911800. Its totient is φ = 17188224.

The previous prime is 51564683. The next prime is 51564701. The reversal of 51564696 is 69646515.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1074241 + ... + 1074288.

Almost surely, 2^51564696 is an apocalyptic number.

It is an amenable number.

51564696 is an abundant number, since it is smaller than the sum of its proper divisors (77347104).

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

51564696 is a wasteful number, since it uses less digits than its factorization.

51564696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2148538 (or 2148534 counting only the distinct ones).

The product of its digits is 194400, while the sum is 42.

The square root of 51564696 is about 7180.8562163575. The cubic root of 51564696 is about 372.2066720697.

The spelling of 51564696 in words is "fifty-one million, five hundred sixty-four thousand, six hundred ninety-six".