216320524 has 12 divisors (see below), whose sum is σ = 432641104. Its totient is φ = 92708784.

The previous prime is 216320479. The next prime is 216320539. The reversal of 216320524 is 425023612.

216320524 is an admirable number.

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, 3862839 + ... + 3862894.

Almost surely, 2^216320524 is an apocalyptic number.

It is an amenable number.

216320524 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

216320524 is a wasteful number, since it uses less digits than its factorization.

216320524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7725744 (or 7725742 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 216320524 is about 14707.8388623210. The cubic root of 216320524 is about 600.2966348036.

The spelling of 216320524 in words is "two hundred sixteen million, three hundred twenty thousand, five hundred twenty-four".