131320031 has 2 divisors, whose sum is σ = 131320032. Its totient is φ = 131320030.

The previous prime is 131320009. The next prime is 131320043. The reversal of 131320031 is 130023131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131320031 - 2²⁶ = 64211167 is a prime.

It is a super-2 number, since 2×131320031² = 34489901083681922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131319988 and 131320015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131320081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65660015 + 65660016.

It is an arithmetic number, because the mean of its divisors is an integer number (65660016).

Almost surely, 2^131320031 is an apocalyptic number.

131320031 is a deficient number, since it is larger than the sum of its proper divisors (1).

131320031 is an equidigital number, since it uses as much as digits as its factorization.

131320031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 131320031 is about 11459.4952332116. The cubic root of 131320031 is about 508.2885486897.

Adding to 131320031 its reverse (130023131), we get a palindrome (261343162).

The spelling of 131320031 in words is "one hundred thirty-one million, three hundred twenty thousand, thirty-one".