204385321 has 12 divisors (see below), whose sum is σ = 243286032. Its totient is φ = 171111528.

The previous prime is 204385297. The next prime is 204385343. The reversal of 204385321 is 123583402.

It is not a de Polignac number, because 204385321 - 2⁷ = 204385193 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 204385321.

It is not an unprimeable number, because it can be changed into a prime (204385351) 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 11 ways as a sum of consecutive naturals, for example, 46395 + ... + 50608.

It is an arithmetic number, because the mean of its divisors is an integer number (20273836).

Almost surely, 2^204385321 is an apocalyptic number.

It is an amenable number.

204385321 is a deficient number, since it is larger than the sum of its proper divisors (38900711).

204385321 is an equidigital number, since it uses as much as digits as its factorization.

204385321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97060 (or 97053 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 204385321 is about 14296.3394265805. The cubic root of 204385321 is about 589.0469349001.

The spelling of 204385321 in words is "two hundred four million, three hundred eighty-five thousand, three hundred twenty-one".