215272164 has 24 divisors (see below), whose sum is σ = 503895168. Its totient is φ = 71529760.

The previous prime is 215272151. The next prime is 215272171. The reversal of 215272164 is 461272512.

215272164 is digitally balanced in base 2, because in such base 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 7 ways as a sum of consecutive naturals, for example, 24492 + ... + 32099.

It is an arithmetic number, because the mean of its divisors is an integer number (20995632).

Almost surely, 2^215272164 is an apocalyptic number.

It is an amenable number.

215272164 is an abundant number, since it is smaller than the sum of its proper divisors (288623004).

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

215272164 is a wasteful number, since it uses less digits than its factorization.

215272164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56915 (or 56913 counting only the distinct ones).

The product of its digits is 6720, while the sum is 30.

The square root of 215272164 is about 14672.1560787772. The cubic root of 215272164 is about 599.3253194056.

The spelling of 215272164 in words is "two hundred fifteen million, two hundred seventy-two thousand, one hundred sixty-four".