216455464 has 32 divisors (see below), whose sum is σ = 416766240. Its totient is φ = 105336000.

The previous prime is 216455453. The next prime is 216455489. The reversal of 216455464 is 464554612.

216455464 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 7 ways as a sum of consecutive naturals, for example, 112914 + ... + 114814.

It is an arithmetic number, because the mean of its divisors is an integer number (13023945).

Almost surely, 2^216455464 is an apocalyptic number.

It is an amenable number.

216455464 is a deficient number, since it is larger than the sum of its proper divisors (200310776).

216455464 is a wasteful number, since it uses less digits than its factorization.

216455464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2281 (or 2277 counting only the distinct ones).

The product of its digits is 115200, while the sum is 37.

The square root of 216455464 is about 14712.4254968377. The cubic root of 216455464 is about 600.4214298514.

The spelling of 216455464 in words is "two hundred sixteen million, four hundred fifty-five thousand, four hundred sixty-four".