55956815 has 16 divisors (see below), whose sum is σ = 70281216. Its totient is φ = 42688800.

The previous prime is 55956799. The next prime is 55956821. The reversal of 55956815 is 51865955.

It is not a de Polignac number, because 55956815 - 2⁴ = 55956799 is a prime.

It is a Duffinian number.

It is a congruent 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, 55970 + ... + 56960.

It is an arithmetic number, because the mean of its divisors is an integer number (4392576).

Almost surely, 2^55956815 is an apocalyptic number.

55956815 is a deficient number, since it is larger than the sum of its proper divisors (14324401).

55956815 is a wasteful number, since it uses less digits than its factorization.

55956815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1510.

The product of its digits is 270000, while the sum is 44.

The square root of 55956815 is about 7480.4287978698. The cubic root of 55956815 is about 382.4878661052.

The spelling of 55956815 in words is "fifty-five million, nine hundred fifty-six thousand, eight hundred fifteen".