212415990 has 32 divisors (see below), whose sum is σ = 516257280. Its totient is φ = 55926624.

The previous prime is 212415979. The next prime is 212416019. The reversal of 212415990 is 99514212.

It is a congruent number.

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, 42444 + ... + 47183.

It is an arithmetic number, because the mean of its divisors is an integer number (16133040).

Almost surely, 2^212415990 is an apocalyptic number.

212415990 is an abundant number, since it is smaller than the sum of its proper divisors (303841290).

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

212415990 is a wasteful number, since it uses less digits than its factorization.

212415990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89716.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 212415990 is about 14574.4979330336. The cubic root of 212415990 is about 596.6629467568.

The spelling of 212415990 in words is "two hundred twelve million, four hundred fifteen thousand, nine hundred ninety".