131371883509 has 2 divisors, whose sum is σ = 131371883510. Its totient is φ = 131371883508.

The previous prime is 131371883471. The next prime is 131371883557. The reversal of 131371883509 is 905388173131.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86743208484 + 44628675025 = 294522^2 + 211255^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131371883509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131371823509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65685941754 + 65685941755.

It is an arithmetic number, because the mean of its divisors is an integer number (65685941755).

Almost surely, 2^131371883509 is an apocalyptic number.

It is an amenable number.

131371883509 is a deficient number, since it is larger than the sum of its proper divisors (1).

131371883509 is an equidigital number, since it uses as much as digits as its factorization.

131371883509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 49.

The spelling of 131371883509 in words is "one hundred thirty-one billion, three hundred seventy-one million, eight hundred eighty-three thousand, five hundred nine".