56557116 has 120 divisors (see below), whose sum is σ = 184415616. Its totient is φ = 14683680.

The previous prime is 56557093. The next prime is 56557117. The reversal of 56557116 is 61175565.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56557117) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 23815 + ... + 26081.

Almost surely, 2^56557116 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56557116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92207808).

56557116 is an abundant number, since it is smaller than the sum of its proper divisors (127858500).

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

56557116 is a wasteful number, since it uses less digits than its factorization.

56557116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2301 (or 2290 counting only the distinct ones).

The product of its digits is 31500, while the sum is 36.

The square root of 56557116 is about 7520.4465292960. The cubic root of 56557116 is about 383.8507720935.

The spelling of 56557116 in words is "fifty-six million, five hundred fifty-seven thousand, one hundred sixteen".