204331311431 has 16 divisors (see below), whose sum is σ = 231975001440. Its totient is φ = 178420838400.

The previous prime is 204331311421. The next prime is 204331311473. The reversal of 204331311431 is 134113133402.

It is a cyclic number.

It is not a de Polignac number, because 204331311431 - 2²⁶ = 204264202567 is a prime.

It is a super-2 number, since 2×204331311431² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 204331311431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204331311421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 448370 + ... + 780831.

It is an arithmetic number, because the mean of its divisors is an integer number (14498437590).

Almost surely, 2^204331311431 is an apocalyptic number.

204331311431 is a deficient number, since it is larger than the sum of its proper divisors (27643690009).

204331311431 is a wasteful number, since it uses less digits than its factorization.

204331311431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229906.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 204331311431 its reverse (134113133402), we get a palindrome (338444444833).

The spelling of 204331311431 in words is "two hundred four billion, three hundred thirty-one million, three hundred eleven thousand, four hundred thirty-one".