56815234521 has 16 divisors (see below), whose sum is σ = 77191652160. Its totient is φ = 37157981120.

The previous prime is 56815234513. The next prime is 56815234561. The reversal of 56815234521 is 12543251865.

It is a cyclic number.

It is not a de Polignac number, because 56815234521 - 2³ = 56815234513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56815234561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2089906 + ... + 2116916.

It is an arithmetic number, because the mean of its divisors is an integer number (4824478260).

Almost surely, 2^56815234521 is an apocalyptic number.

It is an amenable number.

56815234521 is a deficient number, since it is larger than the sum of its proper divisors (20376417639).

56815234521 is a wasteful number, since it uses less digits than its factorization.

56815234521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40296.

The product of its digits is 288000, while the sum is 42.

The spelling of 56815234521 in words is "fifty-six billion, eight hundred fifteen million, two hundred thirty-four thousand, five hundred twenty-one".