216591882 has 32 divisors (see below), whose sum is σ = 471331392. Its totient is φ = 65954304.

The previous prime is 216591871. The next prime is 216591901. The reversal of 216591882 is 288195612.

It is a happy number.

216591882 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6748 + ... + 21879.

It is an arithmetic number, because the mean of its divisors is an integer number (14729106).

Almost surely, 2^216591882 is an apocalyptic number.

216591882 is an abundant number, since it is smaller than the sum of its proper divisors (254739510).

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

216591882 is a wasteful number, since it uses less digits than its factorization.

216591882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28742.

The product of its digits is 69120, while the sum is 42.

The square root of 216591882 is about 14717.0609158215. The cubic root of 216591882 is about 600.5475390718.

The spelling of 216591882 in words is "two hundred sixteen million, five hundred ninety-one thousand, eight hundred eighty-two".