31311312322031 has 12 divisors (see below), whose sum is σ = 36745693968672. Its totient is φ = 26600760906048.

The previous prime is 31311312322027. The next prime is 31311312322079. The reversal of 31311312322031 is 13022321311313.

It is not a de Polignac number, because 31311312322031 - 2² = 31311312322027 is a prime.

It is a super-2 number, since 2×31311312322031² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31311312322001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2827456295 + ... + 2827467368.

It is an arithmetic number, because the mean of its divisors is an integer number (3062141164056).

Almost surely, 2^{31311312322031} is an apocalyptic number.

31311312322031 is a deficient number, since it is larger than the sum of its proper divisors (5434381646641).

31311312322031 is a wasteful number, since it uses less digits than its factorization.

31311312322031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5654923790 (or 5654923783 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 31311312322031 its reverse (13022321311313), we get a palindrome (44333633633344).

The spelling of 31311312322031 in words is "thirty-one trillion, three hundred eleven billion, three hundred twelve million, three hundred twenty-two thousand, thirty-one".