204431310230403 has 4 divisors (see below), whose sum is σ = 272575080307208. Its totient is φ = 136287540153600.

The previous prime is 204431310230363. The next prime is 204431310230431. The reversal of 204431310230403 is 304032013134402.

It is a happy number.

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

It is not a de Polignac number, because 204431310230403 - 2³⁴ = 204414130361219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204431310230473) 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, 34071885038398 + ... + 34071885038403.

It is an arithmetic number, because the mean of its divisors is an integer number (68143770076802).

Almost surely, 2^{204431310230403} is an apocalyptic number.

204431310230403 is a deficient number, since it is larger than the sum of its proper divisors (68143770076805).

204431310230403 is an equidigital number, since it uses as much as digits as its factorization.

204431310230403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68143770076804.

The product of its (nonzero) digits is 20736, while the sum is 30.

Adding to 204431310230403 its reverse (304032013134402), we get a palindrome (508463323364805).

The spelling of 204431310230403 in words is "two hundred four trillion, four hundred thirty-one billion, three hundred ten million, two hundred thirty thousand, four hundred three".