215397252 has 48 divisors (see below), whose sum is σ = 638216320. Its totient is φ = 61541856.

The previous prime is 215397211. The next prime is 215397271. The reversal of 215397252 is 252793512.

215397252 is a `hidden beast` number, since 2 + 1 + 539 + 72 + 52 = 666.

215397252 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 (36).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141703 + ... + 143214.

Almost surely, 2^215397252 is an apocalyptic number.

It is an amenable number.

215397252 is an abundant number, since it is smaller than the sum of its proper divisors (422819068).

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

215397252 is a wasteful number, since it uses less digits than its factorization.

215397252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284937 (or 284929 counting only the distinct ones).

The product of its digits is 37800, while the sum is 36.

The square root of 215397252 is about 14676.4182278920. The cubic root of 215397252 is about 599.4413800677.

The spelling of 215397252 in words is "two hundred fifteen million, three hundred ninety-seven thousand, two hundred fifty-two".