212305590 has 64 divisors (see below), whose sum is σ = 647032320. Its totient is φ = 48526560.

The previous prime is 212305531. The next prime is 212305631. The reversal of 212305590 is 95503212.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 54276 + ... + 58055.

It is an arithmetic number, because the mean of its divisors is an integer number (10109880).

Almost surely, 2^212305590 is an apocalyptic number.

212305590 is an abundant number, since it is smaller than the sum of its proper divisors (434726730).

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

212305590 is a wasteful number, since it uses less digits than its factorization.

212305590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112354 (or 112348 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 212305590 is about 14570.7100032908. The cubic root of 212305590 is about 596.5595599943.

The spelling of 212305590 in words is "two hundred twelve million, three hundred five thousand, five hundred ninety".