56299815 has 72 divisors (see below), whose sum is σ = 115448112. Its totient is φ = 25159680.

The previous prime is 56299811. The next prime is 56299819. The reversal of 56299815 is 51899265.

56299815 is a `hidden beast` number, since 5 + 629 + 9 + 8 + 15 = 666.

56299815 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (56299811) and next prime (56299819).

It is not a de Polignac number, because 56299815 - 2² = 56299811 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56299811) 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 71 ways as a sum of consecutive naturals, for example, 83319 + ... + 83991.

It is an arithmetic number, because the mean of its divisors is an integer number (1603446).

Almost surely, 2^56299815 is an apocalyptic number.

56299815 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

56299815 is an abundant number, since it is smaller than the sum of its proper divisors (59148297).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56299815 is a wasteful number, since it uses less digits than its factorization.

56299815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721 (or 705 counting only the distinct ones).

The product of its digits is 194400, while the sum is 45.

The square root of 56299815 is about 7503.3202650560. The cubic root of 56299815 is about 383.2677900961.

The spelling of 56299815 in words is "fifty-six million, two hundred ninety-nine thousand, eight hundred fifteen".