56566503 has 12 divisors (see below), whose sum is σ = 93379728. Its totient is φ = 32323680.

The previous prime is 56566487. The next prime is 56566507. The reversal of 56566503 is 30566565.

It is a happy number.

It is not a de Polignac number, because 56566503 - 2⁴ = 56566487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56566507) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 448878 + ... + 449003.

It is an arithmetic number, because the mean of its divisors is an integer number (7781644).

Almost surely, 2^56566503 is an apocalyptic number.

56566503 is a deficient number, since it is larger than the sum of its proper divisors (36813225).

56566503 is a wasteful number, since it uses less digits than its factorization.

56566503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897894 (or 897891 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 36.

The square root of 56566503 is about 7521.0706019821. The cubic root of 56566503 is about 383.8720073104.

The spelling of 56566503 in words is "fifty-six million, five hundred sixty-six thousand, five hundred three".