131895518173 has 2 divisors, whose sum is σ = 131895518174. Its totient is φ = 131895518172.

The previous prime is 131895518071. The next prime is 131895518189. The reversal of 131895518173 is 371815598131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116979048484 + 14916469689 = 342022^2 + 122133^2 .

It is a cyclic number.

It is not a de Polignac number, because 131895518173 - 2²¹ = 131893421021 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131895518173.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131845518173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65947759086 + 65947759087.

It is an arithmetic number, because the mean of its divisors is an integer number (65947759087).

Almost surely, 2^131895518173 is an apocalyptic number.

It is an amenable number.

131895518173 is a deficient number, since it is larger than the sum of its proper divisors (1).

131895518173 is an equidigital number, since it uses as much as digits as its factorization.

131895518173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 907200, while the sum is 52.

The spelling of 131895518173 in words is "one hundred thirty-one billion, eight hundred ninety-five million, five hundred eighteen thousand, one hundred seventy-three".