131231009951 has 2 divisors, whose sum is σ = 131231009952. Its totient is φ = 131231009950.

The previous prime is 131231009933. The next prime is 131231009957. The reversal of 131231009951 is 159900132131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131231009951 - 2²⁶ = 131163901087 is a prime.

It is a super-2 number, since 2×131231009951² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131231009957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65615504975 + 65615504976.

It is an arithmetic number, because the mean of its divisors is an integer number (65615504976).

Almost surely, 2^131231009951 is an apocalyptic number.

131231009951 is a deficient number, since it is larger than the sum of its proper divisors (1).

131231009951 is an equidigital number, since it uses as much as digits as its factorization.

131231009951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7290, while the sum is 35.

The spelling of 131231009951 in words is "one hundred thirty-one billion, two hundred thirty-one million, nine thousand, nine hundred fifty-one".