31312331023331 has 16 divisors (see below), whose sum is σ = 32656385357568. Its totient is φ = 29989164902400.

The previous prime is 31312331023327. The next prime is 31312331023367. The reversal of 31312331023331 is 13332013321313.

It is a cyclic number.

It is not a de Polignac number, because 31312331023331 - 2² = 31312331023327 is a prime.

It is a super-2 number, since 2×31312331023331² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31312331023294 and 31312331023303.

It is not an unprimeable number, because it can be changed into a prime (31312331023231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168422381 + ... + 168608193.

It is an arithmetic number, because the mean of its divisors is an integer number (2041024084848).

Almost surely, 2^{31312331023331} is an apocalyptic number.

31312331023331 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

31312331023331 is a deficient number, since it is larger than the sum of its proper divisors (1344054334237).

31312331023331 is a wasteful number, since it uses less digits than its factorization.

31312331023331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241982.

The product of its (nonzero) digits is 8748, while the sum is 29.

Adding to 31312331023331 its reverse (13332013321313), we get a palindrome (44644344344644).

The spelling of 31312331023331 in words is "thirty-one trillion, three hundred twelve billion, three hundred thirty-one million, twenty-three thousand, three hundred thirty-one".