31312122023 has 16 divisors (see below), whose sum is σ = 38594497536. Its totient is φ = 24738104160.

The previous prime is 31312122019. The next prime is 31312122031. The reversal of 31312122023 is 32022121313.

It is not a de Polignac number, because 31312122023 - 2² = 31312122019 is a prime.

It is a super-2 number, since 2×31312122023² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31312121986 and 31312122004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312122223) 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, 189743 + ... + 314048.

It is an arithmetic number, because the mean of its divisors is an integer number (2412156096).

Almost surely, 2^31312122023 is an apocalyptic number.

31312122023 is a deficient number, since it is larger than the sum of its proper divisors (7282375513).

31312122023 is a wasteful number, since it uses less digits than its factorization.

31312122023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504494.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31312122023 its reverse (32022121313), we get a palindrome (63334243336).

The spelling of 31312122023 in words is "thirty-one billion, three hundred twelve million, one hundred twenty-two thousand, twenty-three".