131731355339 has 2 divisors, whose sum is σ = 131731355340. Its totient is φ = 131731355338.

The previous prime is 131731355303. The next prime is 131731355381. The reversal of 131731355339 is 933553137131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131731355339 - 2¹² = 131731351243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131731355339.

It is not a weakly prime, because it can be changed into another prime (131731355939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65865677669 + 65865677670.

It is an arithmetic number, because the mean of its divisors is an integer number (65865677670).

Almost surely, 2^131731355339 is an apocalyptic number.

131731355339 is a deficient number, since it is larger than the sum of its proper divisors (1).

131731355339 is an equidigital number, since it uses as much as digits as its factorization.

131731355339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 382725, while the sum is 44.

The spelling of 131731355339 in words is "one hundred thirty-one billion, seven hundred thirty-one million, three hundred fifty-five thousand, three hundred thirty-nine".