31123423402313 has 4 divisors (see below), whose sum is σ = 33952825529808. Its totient is φ = 28294021274820.

The previous prime is 31123423402273. The next prime is 31123423402373. The reversal of 31123423402313 is 31320432432113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31123423402313 - 2¹⁸ = 31123423140169 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31123423402313.

It is not an unprimeable number, because it can be changed into a prime (31123423402373) 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, 1414701063731 + ... + 1414701063752.

It is an arithmetic number, because the mean of its divisors is an integer number (8488206382452).

Almost surely, 2^{31123423402313} is an apocalyptic number.

It is an amenable number.

31123423402313 is a deficient number, since it is larger than the sum of its proper divisors (2829402127495).

31123423402313 is a wasteful number, since it uses less digits than its factorization.

31123423402313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2829402127494.

The product of its (nonzero) digits is 31104, while the sum is 32.

Adding to 31123423402313 its reverse (31320432432113), we get a palindrome (62443855834426).

The spelling of 31123423402313 in words is "thirty-one trillion, one hundred twenty-three billion, four hundred twenty-three million, four hundred two thousand, three hundred thirteen".