213122604 has 48 divisors (see below), whose sum is σ = 505128960. Its totient is φ = 69928320.

The previous prime is 213122603. The next prime is 213122629. The reversal of 213122604 is 406221312.

It is not an unprimeable number, because it can be changed into a prime (213122603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 460077 + ... + 460539.

It is an arithmetic number, because the mean of its divisors is an integer number (10523520).

Almost surely, 2^213122604 is an apocalyptic number.

It is an amenable number.

213122604 is an abundant number, since it is smaller than the sum of its proper divisors (292006356).

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

213122604 is a wasteful number, since it uses less digits than its factorization.

213122604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990 (or 988 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 213122604 is about 14598.7192588939. The cubic root of 213122604 is about 597.3238256762.

Adding to 213122604 its reverse (406221312), we get a palindrome (619343916).

The spelling of 213122604 in words is "two hundred thirteen million, one hundred twenty-two thousand, six hundred four".