204715317 has 4 divisors (see below), whose sum is σ = 272953760. Its totient is φ = 136476876.

The previous prime is 204715279. The next prime is 204715333. The reversal of 204715317 is 713517402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 204715317 - 2¹⁵ = 204682549 is a prime.

It is a super-2 number, since 2×204715317² = 83816722028820978, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204715417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34119217 + ... + 34119222.

It is an arithmetic number, because the mean of its divisors is an integer number (68238440).

Almost surely, 2^204715317 is an apocalyptic number.

It is an amenable number.

204715317 is a deficient number, since it is larger than the sum of its proper divisors (68238443).

204715317 is an equidigital number, since it uses as much as digits as its factorization.

204715317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68238442.

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 204715317 is about 14307.8760478276. The cubic root of 204715317 is about 589.3637851343.

The spelling of 204715317 in words is "two hundred four million, seven hundred fifteen thousand, three hundred seventeen".