31312313023 has 4 divisors (see below), whose sum is σ = 31406912488. Its totient is φ = 31217713560.

The previous prime is 31312312981. The next prime is 31312313051. The reversal of 31312313023 is 32031321313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32031321313 = 397 ⋅80683429.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31312313023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31312312985 and 31312313003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312313083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47299236 + ... + 47299897.

It is an arithmetic number, because the mean of its divisors is an integer number (7851728122).

Almost surely, 2^31312313023 is an apocalyptic number.

31312313023 is a deficient number, since it is larger than the sum of its proper divisors (94599465).

31312313023 is an equidigital number, since it uses as much as digits as its factorization.

31312313023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94599464.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 31312313023 its reverse (32031321313), we get a palindrome (63343634336).

The spelling of 31312313023 in words is "thirty-one billion, three hundred twelve million, three hundred thirteen thousand, twenty-three".