231031311169 has 2 divisors, whose sum is σ = 231031311170. Its totient is φ = 231031311168.

The previous prime is 231031311151. The next prime is 231031311223. The reversal of 231031311169 is 961113130132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187813890625 + 43217420544 = 433375^2 + 207888^2 .

It is a cyclic number.

It is not a de Polignac number, because 231031311169 - 2¹⁷ = 231031180097 is a prime.

It is a super-2 number, since 2×231031311169² (a number of 24 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 231031311169.

It is not a weakly prime, because it can be changed into another prime (231031311149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115515655584 + 115515655585.

It is an arithmetic number, because the mean of its divisors is an integer number (115515655585).

Almost surely, 2^231031311169 is an apocalyptic number.

It is an amenable number.

231031311169 is a deficient number, since it is larger than the sum of its proper divisors (1).

231031311169 is an equidigital number, since it uses as much as digits as its factorization.

231031311169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 31.

The spelling of 231031311169 in words is "two hundred thirty-one billion, thirty-one million, three hundred eleven thousand, one hundred sixty-nine".