218732216 has 16 divisors (see below), whose sum is σ = 410387040. Its totient is φ = 109295680.

The previous prime is 218732177. The next prime is 218732257. The reversal of 218732216 is 612237812.

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, 5825 + ... + 21711.

It is an arithmetic number, because the mean of its divisors is an integer number (25649190).

Almost surely, 2^218732216 is an apocalyptic number.

It is an amenable number.

218732216 is a deficient number, since it is larger than the sum of its proper divisors (191654824).

218732216 is a wasteful number, since it uses less digits than its factorization.

218732216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17614 (or 17610 counting only the distinct ones).

The product of its digits is 8064, while the sum is 32.

The square root of 218732216 is about 14789.5982365986. The cubic root of 218732216 is about 602.5192372318.

The spelling of 218732216 in words is "two hundred eighteen million, seven hundred thirty-two thousand, two hundred sixteen".