216465044 has 24 divisors (see below), whose sum is σ = 381927168. Its totient is φ = 107347680.

The previous prime is 216465031. The next prime is 216465061. The reversal of 216465044 is 440564612.

It is a self number, because there is not a number n which added to its sum of digits gives 216465044.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 430097 + ... + 430599.

It is an arithmetic number, because the mean of its divisors is an integer number (15913632).

Almost surely, 2^216465044 is an apocalyptic number.

It is an amenable number.

216465044 is a deficient number, since it is larger than the sum of its proper divisors (165462124).

216465044 is a wasteful number, since it uses less digits than its factorization.

216465044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1175 (or 1173 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 216465044 is about 14712.7510683760. The cubic root of 216465044 is about 600.4302876434.

The spelling of 216465044 in words is "two hundred sixteen million, four hundred sixty-five thousand, forty-four".