204431113155 has 16 divisors (see below), whose sum is σ = 328980477600. Its totient is φ = 108399694848.

The previous prime is 204431113129. The next prime is 204431113169. The reversal of 204431113155 is 551311134402.

It is not a de Polignac number, because 204431113155 - 2⁵ = 204431113123 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39386830 + ... + 39392019.

It is an arithmetic number, because the mean of its divisors is an integer number (20561279850).

Almost surely, 2^204431113155 is an apocalyptic number.

204431113155 is a deficient number, since it is larger than the sum of its proper divisors (124549364445).

204431113155 is a wasteful number, since it uses less digits than its factorization.

204431113155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78779030.

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 204431113155 its reverse (551311134402), we get a palindrome (755742247557).

The spelling of 204431113155 in words is "two hundred four billion, four hundred thirty-one million, one hundred thirteen thousand, one hundred fifty-five".