56015556 has 12 divisors (see below), whose sum is σ = 130702992. Its totient is φ = 18671848.

The previous prime is 56015539. The next prime is 56015563. The reversal of 56015556 is 65551065.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2333970 + ... + 2333993.

It is an arithmetic number, because the mean of its divisors is an integer number (10891916).

Almost surely, 2^56015556 is an apocalyptic number.

It is an amenable number.

56015556 is an abundant number, since it is smaller than the sum of its proper divisors (74687436).

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

56015556 is a wasteful number, since it uses less digits than its factorization.

56015556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4667970 (or 4667968 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 33.

The square root of 56015556 is about 7484.3540803465. The cubic root of 56015556 is about 382.6216589384.

It can be divided in two parts, 560155 and 56, that added together give a triangular number (560211 = T₁₀₅₈).

The spelling of 56015556 in words is "fifty-six million, fifteen thousand, five hundred fifty-six".