204431 has 2 divisors, whose sum is σ = 204432. Its totient is φ = 204430.

The previous prime is 204427. The next prime is 204437. The reversal of 204431 is 134402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204431 - 2² = 204427 is a prime.

It is a super-2 number, since 2×204431² = 83584067522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102215 + 102216.

It is an arithmetic number, because the mean of its divisors is an integer number (102216).

2²⁰⁴⁴³¹ is an apocalyptic number.

204431 is a deficient number, since it is larger than the sum of its proper divisors (1).

204431 is an equidigital number, since it uses as much as digits as its factorization.

204431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 204431 is about 452.1404649000. The cubic root of 204431 is about 58.9090814553.

Adding to 204431 its reverse (134402), we get a palindrome (338833).

The spelling of 204431 in words is "two hundred four thousand, four hundred thirty-one".