204713213 has 4 divisors (see below), whose sum is σ = 204742620. Its totient is φ = 204683808.

The previous prime is 204713191. The next prime is 204713219. The reversal of 204713213 is 312317402.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 193710724 + 11002489 = 13918^2 + 3317^2 .

It is a cyclic number.

It is not a de Polignac number, because 204713213 - 2⁸ = 204712957 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 (204713219) 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 3 ways as a sum of consecutive naturals, for example, 2273 + ... + 20361.

It is an arithmetic number, because the mean of its divisors is an integer number (51185655).

Almost surely, 2^204713213 is an apocalyptic number.

It is an amenable number.

204713213 is a deficient number, since it is larger than the sum of its proper divisors (29407).

204713213 is a wasteful number, since it uses less digits than its factorization.

204713213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29406.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 204713213 is about 14307.8025217012. The cubic root of 204713213 is about 589.3617660285.

The spelling of 204713213 in words is "two hundred four million, seven hundred thirteen thousand, two hundred thirteen".