213205804 has 12 divisors (see below), whose sum is σ = 426411664. Its totient is φ = 91373904.

The previous prime is 213205757. The next prime is 213205813. The reversal of 213205804 is 408502312.

213205804 is an admirable 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 3 ways as a sum of consecutive naturals, for example, 3807219 + ... + 3807274.

Almost surely, 2^213205804 is an apocalyptic number.

It is an amenable number.

213205804 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.

213205804 is a wasteful number, since it uses less digits than its factorization.

213205804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7614504 (or 7614502 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 213205804 is about 14601.5685458789. The cubic root of 213205804 is about 597.4015444411.

The spelling of 213205804 in words is "two hundred thirteen million, two hundred five thousand, eight hundred four".