56520223 has 16 divisors (see below), whose sum is σ = 64475136. Its totient is φ = 49230720.

The previous prime is 56520209. The next prime is 56520229. The reversal of 56520223 is 32202565.

It is a cyclic number.

It is not a de Polignac number, because 56520223 - 2⁹ = 56519711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56520229) 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, 9790 + ... + 14452.

It is an arithmetic number, because the mean of its divisors is an integer number (4029696).

Almost surely, 2^56520223 is an apocalyptic number.

56520223 is a deficient number, since it is larger than the sum of its proper divisors (7954913).

56520223 is a wasteful number, since it uses less digits than its factorization.

56520223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4734.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 56520223 is about 7517.9932827850. The cubic root of 56520223 is about 383.7672901913.

Adding to 56520223 its reverse (32202565), we get a palindrome (88722788).

The spelling of 56520223 in words is "fifty-six million, five hundred twenty thousand, two hundred twenty-three".