218572232 has 12 divisors (see below), whose sum is σ = 409901355. Its totient is φ = 109265208.

The previous prime is 218572183. The next prime is 218572241. The reversal of 218572232 is 232275812.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 109286116 + 109286116 = 10454^2 + 10454^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=10454.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 39203 + ... + 44429.

Almost surely, 2^218572232 is an apocalyptic number.

It is an amenable number.

218572232 is a deficient number, since it is larger than the sum of its proper divisors (191329123).

218572232 is an frugal number, since it uses more digits than its factorization.

218572232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10460 (or 5229 counting only the distinct ones).

The product of its digits is 13440, while the sum is 32.

The square root of 218572232 is about 14784.1885810483. The cubic root of 218572232 is about 602.3723042221.

Multiplying 218572232 by its sum of digits (32), we get a square (6994311424 = 83632²).

The spelling of 218572232 in words is "two hundred eighteen million, five hundred seventy-two thousand, two hundred thirty-two".