204313231 has 4 divisors (see below), whose sum is σ = 205350552. Its totient is φ = 203275912.

The previous prime is 204313229. The next prime is 204313237. The reversal of 204313231 is 132313402.

204313231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 204313231 - 2¹ = 204313229 is a prime.

It is a super-2 number, since 2×204313231² = 83487792723318722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204313199 and 204313208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204313237) 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, 518365 + ... + 518758.

It is an arithmetic number, because the mean of its divisors is an integer number (51337638).

Almost surely, 2^204313231 is an apocalyptic number.

204313231 is a deficient number, since it is larger than the sum of its proper divisors (1037321).

204313231 is a wasteful number, since it uses less digits than its factorization.

204313231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1037320.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 204313231 is about 14293.8179294407. The cubic root of 204313231 is about 588.9776713037.

Adding to 204313231 its reverse (132313402), we get a palindrome (336626633).

The spelling of 204313231 in words is "two hundred four million, three hundred thirteen thousand, two hundred thirty-one".