56215656 has 48 divisors (see below), whose sum is σ = 174002400. Its totient is φ = 16061472.

The previous prime is 56215589. The next prime is 56215673. The reversal of 56215656 is 65651265.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 56215656.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55266 + ... + 56273.

It is an arithmetic number, because the mean of its divisors is an integer number (3625050).

Almost surely, 2^56215656 is an apocalyptic number.

56215656 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

56215656 is an abundant number, since it is smaller than the sum of its proper divisors (117786744).

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

56215656 is a wasteful number, since it uses less digits than its factorization.

56215656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111558 (or 111551 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 56215656 is about 7497.7100504087. The cubic root of 56215656 is about 383.0767206731.

The spelling of 56215656 in words is "fifty-six million, two hundred fifteen thousand, six hundred fifty-six".