131310031 has 4 divisors (see below), whose sum is σ = 131668192. Its totient is φ = 130951872.

The previous prime is 131309993. The next prime is 131310043. The reversal of 131310031 is 130013131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131310031 is a prime.

It is a super-2 number, since 2×131310031² = 34484648482441922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131309993 and 131310020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131310061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178530 + ... + 179263.

It is an arithmetic number, because the mean of its divisors is an integer number (32917048).

Almost surely, 2^131310031 is an apocalyptic number.

131310031 is a deficient number, since it is larger than the sum of its proper divisors (358161).

131310031 is an equidigital number, since it uses as much as digits as its factorization.

131310031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358160.

The product of its (nonzero) digits is 27, while the sum is 13.

The square root of 131310031 is about 11459.0589055123. The cubic root of 131310031 is about 508.2756463308.

Adding to 131310031 its reverse (130013131), we get a palindrome (261323162).

It can be divided in two parts, 1313100 and 31, that added together give a palindrome (1313131).

The spelling of 131310031 in words is "one hundred thirty-one million, three hundred ten thousand, thirty-one".