56520015 has 16 divisors (see below), whose sum is σ = 90782208. Its totient is φ = 30027296.

The previous prime is 56519989. The next prime is 56520029. The reversal of 56520015 is 51002565.

It is a cyclic number.

It is not a de Polignac number, because 56520015 - 2⁷ = 56519887 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 3219 + ... + 11108.

It is an arithmetic number, because the mean of its divisors is an integer number (5673888).

Almost surely, 2^56520015 is an apocalyptic number.

56520015 is a deficient number, since it is larger than the sum of its proper divisors (34262193).

56520015 is a wasteful number, since it uses less digits than its factorization.

56520015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14598.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 56520015 is about 7517.9794492935. The cubic root of 56520015 is about 383.7668194236.

The spelling of 56520015 in words is "fifty-six million, five hundred twenty thousand, fifteen".