131576185729 has 2 divisors, whose sum is σ = 131576185730. Its totient is φ = 131576185728.

The previous prime is 131576185723. The next prime is 131576185739. The reversal of 131576185729 is 927581675131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113094327025 + 18481858704 = 336295^2 + 135948^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131576185729 is a prime.

It is a super-2 number, since 2×131576185729² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131576185729.

It is not a weakly prime, because it can be changed into another prime (131576185723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65788092864 + 65788092865.

It is an arithmetic number, because the mean of its divisors is an integer number (65788092865).

Almost surely, 2^131576185729 is an apocalyptic number.

It is an amenable number.

131576185729 is a deficient number, since it is larger than the sum of its proper divisors (1).

131576185729 is an equidigital number, since it uses as much as digits as its factorization.

131576185729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3175200, while the sum is 55.

The spelling of 131576185729 in words is "one hundred thirty-one billion, five hundred seventy-six million, one hundred eighty-five thousand, seven hundred twenty-nine".