131231877 has 16 divisors (see below), whose sum is σ = 202506240. Its totient is φ = 74039472.

The previous prime is 131231851. The next prime is 131231909. The reversal of 131231877 is 778132131.

It is not a de Polignac number, because 131231877 - 2¹⁵ = 131199109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131131877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37893 + ... + 41210.

It is an arithmetic number, because the mean of its divisors is an integer number (12656640).

Almost surely, 2^131231877 is an apocalyptic number.

It is an amenable number.

131231877 is a deficient number, since it is larger than the sum of its proper divisors (71274363).

131231877 is an equidigital number, since it uses as much as digits as its factorization.

131231877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79192.

The product of its digits is 7056, while the sum is 33.

The square root of 131231877 is about 11455.6482575191. The cubic root of 131231877 is about 508.1747866626.

The spelling of 131231877 in words is "one hundred thirty-one million, two hundred thirty-one thousand, eight hundred seventy-seven".