216113656 has 32 divisors (see below), whose sum is σ = 468056880. Its totient is φ = 92454400.

The previous prime is 216113647. The next prime is 216113663. The reversal of 216113656 is 656311612.

216113656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×216113656² = 93410224619372672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70735 + ... + 73726.

Almost surely, 2^216113656 is an apocalyptic number.

It is an amenable number.

216113656 is an abundant number, since it is smaller than the sum of its proper divisors (251943224).

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

216113656 is a wasteful number, since it uses less digits than its factorization.

216113656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144495 (or 144491 counting only the distinct ones).

The product of its digits is 6480, while the sum is 31.

The square root of 216113656 is about 14700.8046038304. The cubic root of 216113656 is about 600.1052185844.

The spelling of 216113656 in words is "two hundred sixteen million, one hundred thirteen thousand, six hundred fifty-six".