131431317 has 24 divisors (see below), whose sum is σ = 183041664. Its totient is φ = 83833344.

The previous prime is 131431309. The next prime is 131431343. The reversal of 131431317 is 713134131.

It is not a de Polignac number, because 131431317 - 2³ = 131431309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131431367) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1163053 + ... + 1163165.

It is an arithmetic number, because the mean of its divisors is an integer number (7626736).

Almost surely, 2^131431317 is an apocalyptic number.

It is an amenable number.

131431317 is a deficient number, since it is larger than the sum of its proper divisors (51610347).

131431317 is an equidigital number, since it uses as much as digits as its factorization.

131431317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349 (or 236 counting only the distinct ones).

The product of its digits is 756, while the sum is 24.

The square root of 131431317 is about 11464.3498289262. The cubic root of 131431317 is about 508.4320896964.

Adding to 131431317 its reverse (713134131), we get a palindrome (844565448).

The spelling of 131431317 in words is "one hundred thirty-one million, four hundred thirty-one thousand, three hundred seventeen".