56637216 has 36 divisors (see below), whose sum is σ = 161062902. Its totient is φ = 18878976.

The previous prime is 56637199. The next prime is 56637221. The reversal of 56637216 is 61273665.

56637216 is a `hidden beast` number, since 5 + 6 + 637 + 2 + 16 = 666.

It can be written as a sum of positive squares in only one way, i.e., 38489616 + 18147600 = 6204^2 + 4260^2 .

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

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

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 98041 + ... + 98616.

Almost surely, 2^56637216 is an apocalyptic number.

It is an amenable number.

56637216 is an abundant number, since it is smaller than the sum of its proper divisors (104425686).

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

56637216 is a wasteful number, since it uses less digits than its factorization.

56637216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196673 (or 196662 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 56637216 is about 7525.7701267046. The cubic root of 56637216 is about 384.0318983918.

The spelling of 56637216 in words is "fifty-six million, six hundred thirty-seven thousand, two hundred sixteen".