204131311231 has 2 divisors, whose sum is σ = 204131311232. Its totient is φ = 204131311230.

The previous prime is 204131311201. The next prime is 204131311259. The reversal of 204131311231 is 132113131402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 204131311231 - 2¹⁷ = 204131180159 is a prime.

It is a super-2 number, since 2×204131311231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204131311201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102065655615 + 102065655616.

It is an arithmetic number, because the mean of its divisors is an integer number (102065655616).

Almost surely, 2^204131311231 is an apocalyptic number.

204131311231 is a deficient number, since it is larger than the sum of its proper divisors (1).

204131311231 is an equidigital number, since it uses as much as digits as its factorization.

204131311231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 204131311231 its reverse (132113131402), we get a palindrome (336244442633).

The spelling of 204131311231 in words is "two hundred four billion, one hundred thirty-one million, three hundred eleven thousand, two hundred thirty-one".