56115515 has 16 divisors (see below), whose sum is σ = 71324928. Its totient is φ = 42293856.

The previous prime is 56115481. The next prime is 56115529. The reversal of 56115515 is 51551165.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 56115515 - 2⁸ = 56115259 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4064 + ... + 11346.

It is an arithmetic number, because the mean of its divisors is an integer number (4457808).

Almost surely, 2^56115515 is an apocalyptic number.

56115515 is a deficient number, since it is larger than the sum of its proper divisors (15209413).

56115515 is a wasteful number, since it uses less digits than its factorization.

56115515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7378.

The product of its digits is 3750, while the sum is 29.

The square root of 56115515 is about 7491.0289680390. The cubic root of 56115515 is about 382.8491180798.

The spelling of 56115515 in words is "fifty-six million, one hundred fifteen thousand, five hundred fifteen".