216320464 has 20 divisors (see below), whose sum is σ = 419839200. Its totient is φ = 107974880.

The previous prime is 216320459. The next prime is 216320477. The reversal of 216320464 is 464023612.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1702 + ... + 20869.

It is an arithmetic number, because the mean of its divisors is an integer number (20991960).

Almost surely, 2^216320464 is an apocalyptic number.

It is an amenable number.

216320464 is a deficient number, since it is larger than the sum of its proper divisors (203518736).

216320464 is a wasteful number, since it uses less digits than its factorization.

216320464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23178 (or 23172 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 216320464 is about 14707.8368225922. The cubic root of 216320464 is about 600.2965793030.

The spelling of 216320464 in words is "two hundred sixteen million, three hundred twenty thousand, four hundred sixty-four".