13231314331 has 4 divisors (see below), whose sum is σ = 13232758464. Its totient is φ = 13229870200.

The previous prime is 13231314329. The next prime is 13231314401. The reversal of 13231314331 is 13341313231.

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 13231314331 - 2¹ = 13231314329 is a prime.

It is a super-2 number, since 2×13231314331² (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 = 13231314296 and 13231314305.

It is not an unprimeable number, because it can be changed into a prime (13231314311) 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, 708235 + ... + 726676.

It is an arithmetic number, because the mean of its divisors is an integer number (3308189616).

Almost surely, 2^13231314331 is an apocalyptic number.

13231314331 is a deficient number, since it is larger than the sum of its proper divisors (1444133).

13231314331 is an equidigital number, since it uses as much as digits as its factorization.

13231314331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1444132.

The product of its digits is 1944, while the sum is 25.

Adding to 13231314331 its reverse (13341313231), we get a palindrome (26572627562).

The spelling of 13231314331 in words is "thirteen billion, two hundred thirty-one million, three hundred fourteen thousand, three hundred thirty-one".