131031031 has 2 divisors, whose sum is σ = 131031032. Its totient is φ = 131031030.

The previous prime is 131031013. The next prime is 131031067. The reversal of 131031031 is 130130131.

It is a happy number.

Together with previous prime (131031013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131031031 - 2⁹ = 131030519 is a prime.

It is a super-2 number, since 2×131031031² = 34338262169845922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131031091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65515515 + 65515516.

It is an arithmetic number, because the mean of its divisors is an integer number (65515516).

Almost surely, 2^131031031 is an apocalyptic number.

131031031 is a deficient number, since it is larger than the sum of its proper divisors (1).

131031031 is an equidigital number, since it uses as much as digits as its factorization.

131031031 is an evil number, because the sum of its binary digits is even.

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

The square root of 131031031 is about 11446.8786575206. The cubic root of 131031031 is about 507.9154061198.

Adding to 131031031 its reverse (130130131), we get a palindrome (261161162).

The spelling of 131031031 in words is "one hundred thirty-one million, thirty-one thousand, thirty-one".