218976164 has 12 divisors (see below), whose sum is σ = 418045488. Its totient is φ = 99534600.

The previous prime is 218976143. The next prime is 218976209. The reversal of 218976164 is 461679812.

218976164 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 4976731 = 218976164 / (2 + 1 + 8 + 9 + 7 + 6 + 1 + 6 + 4).

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, 2488322 + ... + 2488409.

It is an arithmetic number, because the mean of its divisors is an integer number (34837124).

Almost surely, 2^218976164 is an apocalyptic number.

It is an amenable number.

218976164 is a deficient number, since it is larger than the sum of its proper divisors (199069324).

218976164 is a wasteful number, since it uses less digits than its factorization.

218976164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4976746 (or 4976744 counting only the distinct ones).

The product of its digits is 145152, while the sum is 44.

The square root of 218976164 is about 14797.8432212265. The cubic root of 218976164 is about 602.7431468701.

The spelling of 218976164 in words is "two hundred eighteen million, nine hundred seventy-six thousand, one hundred sixty-four".