56836521 has 27 divisors (see below), whose sum is σ = 95767581. Its totient is φ = 32387544.

The previous prime is 56836513. The next prime is 56836523. The reversal of 56836521 is 12563865.

The square root of 56836521 is 7539.

It is a perfect power (a square), and thus also a powerful number.

56836521 is a `hidden beast` number, since 56 + 83 + 6 + 521 = 666.

It is not a de Polignac number, because 56836521 - 2³ = 56836513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56836523) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 158140 + ... + 158498.

Almost surely, 2^56836521 is an apocalyptic number.

56836521 is the 7539-th square number.

56836521 is the 3770-th centered octagonal number.

It is an amenable number.

56836521 is a deficient number, since it is larger than the sum of its proper divisors (38931060).

56836521 is an equidigital number, since it uses as much as digits as its factorization.

56836521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738 (or 369 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The cubic root of 56836521 is about 384.4818373650.

Multiplying 56836521 by its sum of digits (36), we get a square (2046114756 = 45234²).

The spelling of 56836521 in words is "fifty-six million, eight hundred thirty-six thousand, five hundred twenty-one".