204431131402 has 8 divisors (see below), whose sum is σ = 307125087012. Its totient is φ = 102056102400.

The previous prime is 204431131397. The next prime is 204431131447. The reversal of 204431131402 is 204131134402.

It can be written as a sum of positive squares in 2 ways, for example, as 157068749761 + 47362381641 = 396319^2 + 217629^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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, 79730049 + ... + 79732612.

Almost surely, 2^204431131402 is an apocalyptic number.

204431131402 is a deficient number, since it is larger than the sum of its proper divisors (102693955610).

204431131402 is a wasteful number, since it uses less digits than its factorization.

204431131402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159463304.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 204431131402 its reverse (204131134402), we get a palindrome (408562265804).

The spelling of 204431131402 in words is "two hundred four billion, four hundred thirty-one million, one hundred thirty-one thousand, four hundred two".