56165220 has 36 divisors (see below), whose sum is σ = 170368380. Its totient is φ = 14977344.

The previous prime is 56165173. The next prime is 56165233. The reversal of 56165220 is 2256165.

56165220 is a `hidden beast` number, since 5 + 6 + 1 + 652 + 2 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20738916 + 35426304 = 4554^2 + 5952^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 155835 + ... + 156194.

It is an arithmetic number, because the mean of its divisors is an integer number (4732455).

Almost surely, 2^56165220 is an apocalyptic number.

It is an amenable number.

56165220 is an abundant number, since it is smaller than the sum of its proper divisors (114203160).

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

56165220 is a wasteful number, since it uses less digits than its factorization.

56165220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312044 (or 312039 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 56165220 is about 7494.3458687200. The cubic root of 56165220 is about 382.9621224758.

The spelling of 56165220 in words is "fifty-six million, one hundred sixty-five thousand, two hundred twenty".