218164210 has 64 divisors (see below), whose sum is σ = 444610944. Its totient is φ = 77014080.

The previous prime is 218164207. The next prime is 218164231. The reversal of 218164210 is 12461812.

218164210 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 492249 + ... + 492691.

It is an arithmetic number, because the mean of its divisors is an integer number (6947046).

Almost surely, 2^218164210 is an apocalyptic number.

218164210 is an abundant number, since it is smaller than the sum of its proper divisors (226446734).

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

218164210 is a wasteful number, since it uses less digits than its factorization.

218164210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520 (or 498 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 218164210 is about 14770.3828657215. The cubic root of 218164210 is about 601.9972424755.

The spelling of 218164210 in words is "two hundred eighteen million, one hundred sixty-four thousand, two hundred ten".