216623296 has 28 divisors (see below), whose sum is σ = 437979312. Its totient is φ = 106266368.

The previous prime is 216623273. The next prime is 216623321. The reversal of 216623296 is 692326612.

216623296 is digitally balanced in base 3, 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 3 ways as a sum of consecutive naturals, for example, 28540 + ... + 35323.

Almost surely, 2^216623296 is an apocalyptic number.

It is an amenable number.

216623296 is an abundant number, since it is smaller than the sum of its proper divisors (221356016).

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

216623296 is an equidigital number, since it uses as much as digits as its factorization.

216623296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63928 (or 63918 counting only the distinct ones).

The product of its digits is 46656, while the sum is 37.

The square root of 216623296 is about 14718.1281418528. The cubic root of 216623296 is about 600.5765716903.

The spelling of 216623296 in words is "two hundred sixteen million, six hundred twenty-three thousand, two hundred ninety-six".