218426916 has 12 divisors (see below), whose sum is σ = 509662832. Its totient is φ = 72808968.

The previous prime is 218426903. The next prime is 218426933. The reversal of 218426916 is 619624812.

It is a tau number, because it is divible by the number of its divisors (12).

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, 9101110 + ... + 9101133.

Almost surely, 2^218426916 is an apocalyptic number.

It is an amenable number.

218426916 is an abundant number, since it is smaller than the sum of its proper divisors (291235916).

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

218426916 is a wasteful number, since it uses less digits than its factorization.

218426916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18202250 (or 18202248 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 218426916 is about 14779.2731891660. The cubic root of 218426916 is about 602.2387804911.

The spelling of 218426916 in words is "two hundred eighteen million, four hundred twenty-six thousand, nine hundred sixteen".