131723557277 has 18 divisors (see below), whose sum is σ = 143177330106. Its totient is φ = 121130886240.

The previous prime is 131723557267. The next prime is 131723557283. The reversal of 131723557277 is 772755327131.

It can be written as a sum of positive squares in 3 ways, for example, as 17705229721 + 114018327556 = 133061^2 + 337666^2 .

It is not a de Polignac number, because 131723557277 - 2⁶ = 131723557213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131723557237) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 12406223 + ... + 12416835.

It is an arithmetic number, because the mean of its divisors is an integer number (7954296117).

Almost surely, 2^131723557277 is an apocalyptic number.

It is an amenable number.

131723557277 is a deficient number, since it is larger than the sum of its proper divisors (11453772829).

131723557277 is an equidigital number, since it uses as much as digits as its factorization.

131723557277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11181 (or 10897 counting only the distinct ones).

The product of its digits is 2160900, while the sum is 50.

The spelling of 131723557277 in words is "one hundred thirty-one billion, seven hundred twenty-three million, five hundred fifty-seven thousand, two hundred seventy-seven".