13213431231 has 192 divisors, whose sum is σ = 25811788800. Its totient is φ = 5830133760.

The previous prime is 13213431167. The next prime is 13213431239.

13213431231 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 13213431231 - 2⁶ = 13213431167 is a prime.

It is a super-2 number, since 2×13213431231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13213431239) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 23221915 + ... + 23222483.

It is an arithmetic number, because the mean of its divisors is an integer number (134436400).

Almost surely, 2^13213431231 is an apocalyptic number.

13213431231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13213431231 is a deficient number, since it is larger than the sum of its proper divisors (12598357569).

13213431231 is a wasteful number, since it uses less digits than its factorization.

13213431231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670 (or 659 counting only the distinct ones).

The product of its digits is 1296, while the sum is 24.

It can be divided in two parts, 13213 and 431231, that added together give a palindrome (444444).

The spelling of 13213431231 in words is "thirteen billion, two hundred thirteen million, four hundred thirty-one thousand, two hundred thirty-one".