218336612 has 12 divisors (see below), whose sum is σ = 411480636. Its totient is φ = 100770720.

The previous prime is 218336561. The next prime is 218336647. The reversal of 218336612 is 216633812.

It can be written as a sum of positive squares in 2 ways, for example, as 29658916 + 188677696 = 5446^2 + 13736^2 .

It is a super-2 number, since 2×218336612² = 95341752279277088, which contains 22 as substring.

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, 2099339 + ... + 2099442.

It is an arithmetic number, because the mean of its divisors is an integer number (34290053).

Almost surely, 2^218336612 is an apocalyptic number.

It is an amenable number.

218336612 is a deficient number, since it is larger than the sum of its proper divisors (193144024).

218336612 is a wasteful number, since it uses less digits than its factorization.

218336612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4198798 (or 4198796 counting only the distinct ones).

The product of its digits is 10368, while the sum is 32.

The square root of 218336612 is about 14776.2177839933. The cubic root of 218336612 is about 602.1557747452.

The spelling of 218336612 in words is "two hundred eighteen million, three hundred thirty-six thousand, six hundred twelve".