218946916 has 12 divisors (see below), whose sum is σ = 383572588. Its totient is φ = 109354752.

The previous prime is 218946911. The next prime is 218946953. The reversal of 218946916 is 619649812.

It is a happy number.

218946916 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 102090816 + 116856100 = 10104^2 + 10810^2 .

It is a super-2 number, since 2×218946916² = 95875504051822112, which contains 22 as substring.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (218946911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25461 + ... + 32956.

Almost surely, 2^218946916 is an apocalyptic number.

It is an amenable number.

218946916 is a deficient number, since it is larger than the sum of its proper divisors (164625672).

218946916 is a wasteful number, since it uses less digits than its factorization.

218946916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59358 (or 59356 counting only the distinct ones).

The product of its digits is 186624, while the sum is 46.

The square root of 218946916 is about 14796.8549361004. The cubic root of 218946916 is about 602.7163101341.

The spelling of 218946916 in words is "two hundred eighteen million, nine hundred forty-six thousand, nine hundred sixteen".