13231031131 has 4 divisors (see below), whose sum is σ = 13231429600. Its totient is φ = 13230632664.

The previous prime is 13231031113. The next prime is 13231031171. The reversal of 13231031131 is 13113013231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13231031131 - 2²⁷ = 13096813403 is a prime.

It is a super-2 number, since 2×13231031131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13231031099 and 13231031108.

It is not an unprimeable number, because it can be changed into a prime (13231031171) 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, 144396 + ... + 217513.

It is an arithmetic number, because the mean of its divisors is an integer number (3307857400).

Almost surely, 2^13231031131 is an apocalyptic number.

13231031131 is a deficient number, since it is larger than the sum of its proper divisors (398469).

13231031131 is an equidigital number, since it uses as much as digits as its factorization.

13231031131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398468.

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

Adding to 13231031131 its reverse (13113013231), we get a palindrome (26344044362).

The spelling of 13231031131 in words is "thirteen billion, two hundred thirty-one million, thirty-one thousand, one hundred thirty-one".