131287392 has 60 divisors (see below), whose sum is σ = 386120196. Its totient is φ = 43761600.

The previous prime is 131287391. The next prime is 131287411. The reversal of 131287392 is 293782131.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131287391) 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 9 ways as a sum of consecutive naturals, for example, 22734 + ... + 27917.

Almost surely, 2^131287392 is an apocalyptic number.

131287392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

131287392 is an abundant number, since it is smaller than the sum of its proper divisors (254832804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131287392 is an equidigital number, since it uses as much as digits as its factorization.

131287392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50673 (or 50656 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 131287392 is about 11458.0710418464. The cubic root of 131287392 is about 508.2464342602.

The spelling of 131287392 in words is "one hundred thirty-one million, two hundred eighty-seven thousand, three hundred ninety-two".