13431331431231 has 12 divisors (see below), whose sum is σ = 20832269158872. Its totient is φ = 7675046532048.

The previous prime is 13431331431197. The next prime is 13431331431233. The reversal of 13431331431231 is 13213413313431.

It is not a de Polignac number, because 13431331431231 - 2²² = 13431327236927 is a prime.

It is a super-2 number, since 2×13431331431231² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13431331431192 and 13431331431201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13431331431233) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45684800640 + ... + 45684800933.

It is an arithmetic number, because the mean of its divisors is an integer number (1736022429906).

Almost surely, 2^{13431331431231} is an apocalyptic number.

13431331431231 is a deficient number, since it is larger than the sum of its proper divisors (7400937727641).

13431331431231 is an equidigital number, since it uses as much as digits as its factorization.

13431331431231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91369601590 (or 91369601583 counting only the distinct ones).

The product of its digits is 23328, while the sum is 33.

Adding to 13431331431231 its reverse (13213413313431), we get a palindrome (26644744744662).

The spelling of 13431331431231 in words is "thirteen trillion, four hundred thirty-one billion, three hundred thirty-one million, four hundred thirty-one thousand, two hundred thirty-one".