313123123231 has 2 divisors, whose sum is σ = 313123123232. Its totient is φ = 313123123230.

The previous prime is 313123123151. The next prime is 313123123237. The reversal of 313123123231 is 132321321313.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 313123123231 - 2²³ = 313114734623 is a prime.

It is a super-2 number, since 2×313123123231² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 313123123196 and 313123123205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313123123237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156561561615 + 156561561616.

It is an arithmetic number, because the mean of its divisors is an integer number (156561561616).

Almost surely, 2^313123123231 is an apocalyptic number.

313123123231 is a deficient number, since it is larger than the sum of its proper divisors (1).

313123123231 is an equidigital number, since it uses as much as digits as its factorization.

313123123231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 25.

Adding to 313123123231 its reverse (132321321313), we get a palindrome (445444444544).

The spelling of 313123123231 in words is "three hundred thirteen billion, one hundred twenty-three million, one hundred twenty-three thousand, two hundred thirty-one".