131865782273 has 2 divisors, whose sum is σ = 131865782274. Its totient is φ = 131865782272.

The previous prime is 131865782233. The next prime is 131865782287. The reversal of 131865782273 is 372287568131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129447404944 + 2418377329 = 359788^2 + 49177^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131865782273 is a prime.

It is not a weakly prime, because it can be changed into another prime (131865782203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65932891136 + 65932891137.

It is an arithmetic number, because the mean of its divisors is an integer number (65932891137).

Almost surely, 2^131865782273 is an apocalyptic number.

It is an amenable number.

131865782273 is a deficient number, since it is larger than the sum of its proper divisors (1).

131865782273 is an equidigital number, since it uses as much as digits as its factorization.

131865782273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3386880, while the sum is 53.

The spelling of 131865782273 in words is "one hundred thirty-one billion, eight hundred sixty-five million, seven hundred eighty-two thousand, two hundred seventy-three".