31312031113 has 4 divisors (see below), whose sum is σ = 34158579408. Its totient is φ = 28465482820.

The previous prime is 31312031021. The next prime is 31312031123. The reversal of 31312031113 is 31113021313.

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 31312031113 - 2¹³ = 31312022921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31312031123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1423274131 + ... + 1423274152.

It is an arithmetic number, because the mean of its divisors is an integer number (8539644852).

Almost surely, 2^31312031113 is an apocalyptic number.

It is an amenable number.

31312031113 is a deficient number, since it is larger than the sum of its proper divisors (2846548295).

31312031113 is a wasteful number, since it uses less digits than its factorization.

31312031113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2846548294.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 31312031113 its reverse (31113021313), we get a palindrome (62425052426).

The spelling of 31312031113 in words is "thirty-one billion, three hundred twelve million, thirty-one thousand, one hundred thirteen".