204315 has 16 divisors (see below), whose sum is σ = 334368. Its totient is φ = 106496.

The previous prime is 204311. The next prime is 204319. The reversal of 204315 is 513402.

It is an interprime number because it is at equal distance from previous prime (204311) and next prime (204319).

It is a cyclic number.

It is not a de Polignac number, because 204315 - 2² = 204311 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 204294 and 204303.

It is not an unprimeable number, because it can be changed into a prime (204311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 667 + ... + 923.

It is an arithmetic number, because the mean of its divisors is an integer number (20898).

2²⁰⁴³¹⁵ is an apocalyptic number.

204315 is a deficient number, since it is larger than the sum of its proper divisors (130053).

204315 is a wasteful number, since it uses less digits than its factorization.

204315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 204315 is about 452.0121679778. The cubic root of 204315 is about 58.8979371142.

Adding to 204315 its reverse (513402), we get a palindrome (717717).

The spelling of 204315 in words is "two hundred four thousand, three hundred fifteen".