218163072 has 32 divisors (see below), whose sum is σ = 579496680. Its totient is φ = 72720896.

The previous prime is 218163067. The next prime is 218163083. The reversal of 218163072 is 270361812.

It is a tau number, because it is divible by the number of its divisors (32).

It is an alternating number because its digits alternate between even and odd.

It is a congruent 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, 283683 + ... + 284450.

Almost surely, 2^218163072 is an apocalyptic number.

It is an amenable number.

218163072 is an abundant number, since it is smaller than the sum of its proper divisors (361333608).

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

218163072 is an equidigital number, since it uses as much as digits as its factorization.

218163072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568150 (or 568138 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 218163072 is about 14770.3443426347. The cubic root of 218163072 is about 601.9961957501.

The spelling of 218163072 in words is "two hundred eighteen million, one hundred sixty-three thousand, seventy-two".