131232931 has 2 divisors, whose sum is σ = 131232932. Its totient is φ = 131232930.

The previous prime is 131232887. The next prime is 131233027. The reversal of 131232931 is 139232131.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131232931 is a prime.

It is a super-2 number, since 2×131232931² = 34444164357701522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131232896 and 131232905.

It is not a weakly prime, because it can be changed into another prime (131232631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65616465 + 65616466.

It is an arithmetic number, because the mean of its divisors is an integer number (65616466).

Almost surely, 2^131232931 is an apocalyptic number.

131232931 is a deficient number, since it is larger than the sum of its proper divisors (1).

131232931 is an equidigital number, since it uses as much as digits as its factorization.

131232931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 972, while the sum is 25.

The square root of 131232931 is about 11455.6942609342. The cubic root of 131232931 is about 508.1761471420.

It can be divided in two parts, 1312 and 32931, that added together give a palindrome (34243).

The spelling of 131232931 in words is "one hundred thirty-one million, two hundred thirty-two thousand, nine hundred thirty-one".