621213204 has 48 divisors (see below), whose sum is σ = 1465547328. Its totient is φ = 204791808.

The previous prime is 621213191. The next prime is 621213221. The reversal of 621213204 is 402312126.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 483547 + ... + 484829.

It is an arithmetic number, because the mean of its divisors is an integer number (30532236).

Almost surely, 2^621213204 is an apocalyptic number.

It is an amenable number.

621213204 is an abundant number, since it is smaller than the sum of its proper divisors (844334124).

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

621213204 is a wasteful number, since it uses less digits than its factorization.

621213204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1704 (or 1702 counting only the distinct ones).

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

The square root of 621213204 is about 24924.1490125541. The cubic root of 621213204 is about 853.2577194692.

The spelling of 621213204 in words is "six hundred twenty-one million, two hundred thirteen thousand, two hundred four".