56520531 has 16 divisors (see below), whose sum is σ = 83855520. Its totient is φ = 37625760.

The previous prime is 56520521. The next prime is 56520539. The reversal of 56520531 is 13502565.

56520531 is a `hidden beast` number, since 5 + 652 + 0 + 5 + 3 + 1 = 666.

It is not a de Polignac number, because 56520531 - 2⁶ = 56520467 is a prime.

It is a super-2 number, since 2×56520531² = 6389140849043922, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 56520495 and 56520504.

It is not an unprimeable number, because it can be changed into a prime (56520539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27661 + ... + 29633.

It is an arithmetic number, because the mean of its divisors is an integer number (5240970).

Almost surely, 2^56520531 is an apocalyptic number.

56520531 is a deficient number, since it is larger than the sum of its proper divisors (27334989).

56520531 is a wasteful number, since it uses less digits than its factorization.

56520531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3043 (or 3037 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 56520531 is about 7518.0137669467. The cubic root of 56520531 is about 383.7679872876.

The spelling of 56520531 in words is "fifty-six million, five hundred twenty thousand, five hundred thirty-one".