131322031 has 4 divisors (see below), whose sum is σ = 131425200. Its totient is φ = 131218864.

The previous prime is 131322017. The next prime is 131322047. The reversal of 131322031 is 130223131.

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 131322031 - 2⁵ = 131321999 is a prime.

It is a super-2 number, since 2×131322031² = 34490951651929922, 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 = 131321996 and 131322014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131322131) 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, 49651 + ... + 52228.

It is an arithmetic number, because the mean of its divisors is an integer number (32856300).

Almost surely, 2^131322031 is an apocalyptic number.

131322031 is a deficient number, since it is larger than the sum of its proper divisors (103169).

131322031 is a wasteful number, since it uses less digits than its factorization.

131322031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103168.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 131322031 is about 11459.5824967579. The cubic root of 131322031 is about 508.2911290829.

Adding to 131322031 its reverse (130223131), we get a palindrome (261545162).

The spelling of 131322031 in words is "one hundred thirty-one million, three hundred twenty-two thousand, thirty-one".