56206521 has 32 divisors (see below), whose sum is σ = 96337920. Its totient is φ = 31722192.

The previous prime is 56206499. The next prime is 56206523. The reversal of 56206521 is 12560265.

56206521 is a `hidden beast` number, since 5 + 6 + 2 + 0 + 652 + 1 = 666.

It is not a de Polignac number, because 56206521 - 2⁷ = 56206393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (56206523) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13896 + ... + 17478.

It is an arithmetic number, because the mean of its divisors is an integer number (3010560).

Almost surely, 2^56206521 is an apocalyptic number.

It is an amenable number.

56206521 is a deficient number, since it is larger than the sum of its proper divisors (40131399).

56206521 is a wasteful number, since it uses less digits than its factorization.

56206521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3682 (or 3676 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 56206521 is about 7497.1008396580. The cubic root of 56206521 is about 383.0559696602.

Adding to 56206521 its reverse (12560265), we get a palindrome (68766786).

The spelling of 56206521 in words is "fifty-six million, two hundred six thousand, five hundred twenty-one".