312131310310231 has 2 divisors, whose sum is σ = 312131310310232. Its totient is φ = 312131310310230.

The previous prime is 312131310310163. The next prime is 312131310310243. The reversal of 312131310310231 is 132013013131213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 312131310310231 - 2¹¹ = 312131310308183 is a prime.

It is a super-2 number, since 2×312131310310231² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 312131310310196 and 312131310310205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312131310310331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156065655155115 + 156065655155116.

It is an arithmetic number, because the mean of its divisors is an integer number (156065655155116).

Almost surely, 2^{312131310310231} is an apocalyptic number.

312131310310231 is a deficient number, since it is larger than the sum of its proper divisors (1).

312131310310231 is an equidigital number, since it uses as much as digits as its factorization.

312131310310231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 25.

Adding to 312131310310231 its reverse (132013013131213), we get a palindrome (444144323441444).

The spelling of 312131310310231 in words is "three hundred twelve trillion, one hundred thirty-one billion, three hundred ten million, three hundred ten thousand, two hundred thirty-one".