56616515 has 4 divisors (see below), whose sum is σ = 67939824. Its totient is φ = 45293208.

The previous prime is 56616493. The next prime is 56616533. The reversal of 56616515 is 51561665.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 56616515 - 2⁶ = 56616451 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5661647 + ... + 5661656.

It is an arithmetic number, because the mean of its divisors is an integer number (16984956).

Almost surely, 2^56616515 is an apocalyptic number.

56616515 is a deficient number, since it is larger than the sum of its proper divisors (11323309).

56616515 is a wasteful number, since it uses less digits than its factorization.

56616515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11323308.

The product of its digits is 27000, while the sum is 35.

The square root of 56616515 is about 7524.3946600374. The cubic root of 56616515 is about 383.9851045835.

The spelling of 56616515 in words is "fifty-six million, six hundred sixteen thousand, five hundred fifteen".