31130231313 has 16 divisors (see below), whose sum is σ = 43702560000. Its totient is φ = 19656245520.

The previous prime is 31130231261. The next prime is 31130231329. The reversal of 31130231313 is 31313203113.

It is not a de Polignac number, because 31130231313 - 2⁸ = 31130231057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31130231313.

It is not an unprimeable number, because it can be changed into a prime (31130231213) 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, 166438 + ... + 299936.

It is an arithmetic number, because the mean of its divisors is an integer number (2731410000).

Almost surely, 2^31130231313 is an apocalyptic number.

It is an amenable number.

31130231313 is a deficient number, since it is larger than the sum of its proper divisors (12572328687).

31130231313 is a wasteful number, since it uses less digits than its factorization.

31130231313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137612.

The product of its (nonzero) digits is 486, while the sum is 21.

Adding to 31130231313 its reverse (31313203113), we get a palindrome (62443434426).

The spelling of 31130231313 in words is "thirty-one billion, one hundred thirty million, two hundred thirty-one thousand, three hundred thirteen".