31312323322331 has 2 divisors, whose sum is σ = 31312323322332. Its totient is φ = 31312323322330.

The previous prime is 31312323322309. The next prime is 31312323322339. The reversal of 31312323322331 is 13322332321313.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31312323322331 is a prime.

It is a super-2 number, since 2×31312323322331² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31312323322339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15656161661165 + 15656161661166.

It is an arithmetic number, because the mean of its divisors is an integer number (15656161661166).

Almost surely, 2^{31312323322331} is an apocalyptic number.

31312323322331 is a deficient number, since it is larger than the sum of its proper divisors (1).

31312323322331 is an equidigital number, since it uses as much as digits as its factorization.

31312323322331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 32.

Adding to 31312323322331 its reverse (13322332321313), we get a palindrome (44634655643644).

The spelling of 31312323322331 in words is "thirty-one trillion, three hundred twelve billion, three hundred twenty-three million, three hundred twenty-two thousand, three hundred thirty-one".