164870218 has 4 divisors (see below), whose sum is σ = 247305330. Its totient is φ = 82435108.

The previous prime is 164870207. The next prime is 164870231. The reversal of 164870218 is 812078461.

164870218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 149401729 + 15468489 = 12223^2 + 3933^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41217553 + ... + 41217556.

Almost surely, 2^164870218 is an apocalyptic number.

164870218 is a deficient number, since it is larger than the sum of its proper divisors (82435112).

164870218 is an equidigital number, since it uses as much as digits as its factorization.

164870218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82435111.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 164870218 is about 12840.1798274012. The cubic root of 164870218 is about 548.3368136519.

The spelling of 164870218 in words is "one hundred sixty-four million, eight hundred seventy thousand, two hundred eighteen".