212151604 has 12 divisors (see below), whose sum is σ = 424303264. Its totient is φ = 90922104.

The previous prime is 212151593. The next prime is 212151607. The reversal of 212151604 is 406151212.

212151604 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212151607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3788394 + ... + 3788449.

Almost surely, 2^212151604 is an apocalyptic number.

It is an amenable number.

212151604 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

212151604 is a wasteful number, since it uses less digits than its factorization.

212151604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7576854 (or 7576852 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 212151604 is about 14565.4249508897. The cubic root of 212151604 is about 596.4152961863.

The spelling of 212151604 in words is "two hundred twelve million, one hundred fifty-one thousand, six hundred four".