131311230331 has 2 divisors, whose sum is σ = 131311230332. Its totient is φ = 131311230330.

The previous prime is 131311230329. The next prime is 131311230341. The reversal of 131311230331 is 133032113131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131311230331 - 2¹ = 131311230329 is a prime.

It is a super-2 number, since 2×131311230331² (a number of 23 digits) contains 22 as substring.

Together with 131311230329, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (131311230341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65655615165 + 65655615166.

It is an arithmetic number, because the mean of its divisors is an integer number (65655615166).

Almost surely, 2^131311230331 is an apocalyptic number.

131311230331 is a deficient number, since it is larger than the sum of its proper divisors (1).

131311230331 is an equidigital number, since it uses as much as digits as its factorization.

131311230331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 22.

Adding to 131311230331 its reverse (133032113131), we get a palindrome (264343343462).

The spelling of 131311230331 in words is "one hundred thirty-one billion, three hundred eleven million, two hundred thirty thousand, three hundred thirty-one".