56215664 has 20 divisors (see below), whose sum is σ = 109045104. Its totient is φ = 28075008.

The previous prime is 56215589. The next prime is 56215673. The reversal of 56215664 is 46651265.

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, 18029 + ... + 20915.

Almost surely, 2^56215664 is an apocalyptic number.

It is an amenable number.

56215664 is a deficient number, since it is larger than the sum of its proper divisors (52829440).

56215664 is a wasteful number, since it uses less digits than its factorization.

56215664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4112 (or 4106 counting only the distinct ones).

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

The square root of 56215664 is about 7497.7105839049. The cubic root of 56215664 is about 383.0767388449.

The spelling of 56215664 in words is "fifty-six million, two hundred fifteen thousand, six hundred sixty-four".