204323213 has 12 divisors (see below), whose sum is σ = 215550972. Its totient is φ = 193423680.

The previous prime is 204323179. The next prime is 204323219. The reversal of 204323213 is 312323402.

It can be written as a sum of positive squares in 2 ways, for example, as 91049764 + 113273449 = 9542^2 + 10643^2 .

It is not a de Polignac number, because 204323213 - 2⁶ = 204323149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204323219) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 556556 + ... + 556922.

It is an arithmetic number, because the mean of its divisors is an integer number (17962581).

Almost surely, 2^204323213 is an apocalyptic number.

It is an amenable number.

204323213 is a deficient number, since it is larger than the sum of its proper divisors (11227759).

204323213 is an frugal number, since it uses more digits than its factorization.

204323213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812 (or 445 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 204323213 is about 14294.1670971064. The cubic root of 204323213 is about 588.9872629151.

Adding to 204323213 its reverse (312323402), we get a palindrome (516646615).

The spelling of 204323213 in words is "two hundred four million, three hundred twenty-three thousand, two hundred thirteen".