31313321233113 has 4 divisors (see below), whose sum is σ = 41751094977488. Its totient is φ = 20875547488740.

The previous prime is 31313321233091. The next prime is 31313321233133. The reversal of 31313321233113 is 31133212331313.

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 not a de Polignac number, because 31313321233113 - 2¹⁸ = 31313320970969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31313321233133) 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, 5218886872183 + ... + 5218886872188.

It is an arithmetic number, because the mean of its divisors is an integer number (10437773744372).

Almost surely, 2^{31313321233113} is an apocalyptic number.

It is an amenable number.

31313321233113 is a deficient number, since it is larger than the sum of its proper divisors (10437773744375).

31313321233113 is a wasteful number, since it uses less digits than its factorization.

31313321233113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10437773744374.

The product of its digits is 8748, while the sum is 30.

Adding to 31313321233113 its reverse (31133212331313), we get a palindrome (62446533564426).

The spelling of 31313321233113 in words is "thirty-one trillion, three hundred thirteen billion, three hundred twenty-one million, two hundred thirty-three thousand, one hundred thirteen".