131565525317 has 2 divisors, whose sum is σ = 131565525318. Its totient is φ = 131565525316.

The previous prime is 131565525283. The next prime is 131565525439. The reversal of 131565525317 is 713525565131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106694342881 + 24871182436 = 326641^2 + 157706^2 .

It is a cyclic number.

It is not a de Polignac number, because 131565525317 - 2³⁰ = 130491783493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131561525317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65782762658 + 65782762659.

It is an arithmetic number, because the mean of its divisors is an integer number (65782762659).

Almost surely, 2^131565525317 is an apocalyptic number.

It is an amenable number.

131565525317 is a deficient number, since it is larger than the sum of its proper divisors (1).

131565525317 is an equidigital number, since it uses as much as digits as its factorization.

131565525317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 472500, while the sum is 44.

The spelling of 131565525317 in words is "one hundred thirty-one billion, five hundred sixty-five million, five hundred twenty-five thousand, three hundred seventeen".