56811915 has 32 divisors (see below), whose sum is σ = 101606400. Its totient is φ = 30117600.

The previous prime is 56811893. The next prime is 56811917. The reversal of 56811915 is 51911865.

56811915 is a `hidden beast` number, since 568 + 1 + 1 + 91 + 5 = 666.

56811915 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 56811915 - 2⁵ = 56811883 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 56811915.

It is not an unprimeable number, because it can be changed into a prime (56811917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22990 + ... + 25340.

It is an arithmetic number, because the mean of its divisors is an integer number (3175200).

Almost surely, 2^56811915 is an apocalyptic number.

56811915 is a deficient number, since it is larger than the sum of its proper divisors (44794485).

56811915 is a wasteful number, since it uses less digits than its factorization.

56811915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2544 (or 2538 counting only the distinct ones).

The product of its digits is 10800, while the sum is 36.

The square root of 56811915 is about 7537.3679092904. The cubic root of 56811915 is about 384.4263453122.

The spelling of 56811915 in words is "fifty-six million, eight hundred eleven thousand, nine hundred fifteen".