131881392 has 40 divisors (see below), whose sum is σ = 378549680. Its totient is φ = 43960320.

The previous prime is 131881381. The next prime is 131881397. The reversal of 131881392 is 293188131.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (131881397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152209 + ... + 153072.

It is an arithmetic number, because the mean of its divisors is an integer number (9463742).

Almost surely, 2^131881392 is an apocalyptic number.

131881392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

131881392 is an abundant number, since it is smaller than the sum of its proper divisors (246668288).

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

131881392 is a wasteful number, since it uses less digits than its factorization.

131881392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305298 (or 305286 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 131881392 is about 11483.9623823835. The cubic root of 131881392 is about 509.0117888328.

The spelling of 131881392 in words is "one hundred thirty-one million, eight hundred eighty-one thousand, three hundred ninety-two".