212256590 has 64 divisors (see below), whose sum is σ = 481783680. Its totient is φ = 65525760.

The previous prime is 212256587. The next prime is 212256691. The reversal of 212256590 is 95652212.

It is a congruent number.

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, 34466 + ... + 40154.

It is an arithmetic number, because the mean of its divisors is an integer number (7527870).

Almost surely, 2^212256590 is an apocalyptic number.

212256590 is an abundant number, since it is smaller than the sum of its proper divisors (269527090).

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

212256590 is a wasteful number, since it uses less digits than its factorization.

212256590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5757.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 212256590 is about 14569.0284507925. The cubic root of 212256590 is about 596.5136612694.

The spelling of 212256590 in words is "two hundred twelve million, two hundred fifty-six thousand, five hundred ninety".