213228904 has 32 divisors (see below), whose sum is σ = 463363200. Its totient is φ = 90095040.

The previous prime is 213228893. The next prime is 213228913. The reversal of 213228904 is 409822312.

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, 22839 + ... + 30790.

It is an arithmetic number, because the mean of its divisors is an integer number (14480100).

Almost surely, 2^213228904 is an apocalyptic number.

It is an amenable number.

213228904 is an abundant number, since it is smaller than the sum of its proper divisors (250134296).

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

213228904 is a wasteful number, since it uses less digits than its factorization.

213228904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53713 (or 53709 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 213228904 is about 14602.3595353628. The cubic root of 213228904 is about 597.4231190215.

The spelling of 213228904 in words is "two hundred thirteen million, two hundred twenty-eight thousand, nine hundred four".