204320231 has 4 divisors (see below), whose sum is σ = 204573600. Its totient is φ = 204066864.

The previous prime is 204320227. The next prime is 204320251. The reversal of 204320231 is 132023402.

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 204320231 - 2² = 204320227 is a prime.

It is a super-2 number, since 2×204320231² = 83493513591786722, 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 (204320251) 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, 125471 + ... + 127088.

It is an arithmetic number, because the mean of its divisors is an integer number (51143400).

Almost surely, 2^204320231 is an apocalyptic number.

204320231 is a deficient number, since it is larger than the sum of its proper divisors (253369).

204320231 is an equidigital number, since it uses as much as digits as its factorization.

204320231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253368.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 204320231 is about 14294.0627884447. The cubic root of 204320231 is about 588.9843975716.

Adding to 204320231 its reverse (132023402), we get a palindrome (336343633).

The spelling of 204320231 in words is "two hundred four million, three hundred twenty thousand, two hundred thirty-one".