131281392 has 40 divisors (see below), whose sum is σ = 369976320. Its totient is φ = 39782080.

The previous prime is 131281369. The next prime is 131281399. The reversal of 131281392 is 293182131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131281399) 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, 123792 + ... + 124847.

It is an arithmetic number, because the mean of its divisors is an integer number (9249408).

Almost surely, 2^131281392 is an apocalyptic number.

131281392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

131281392 is an abundant number, since it is smaller than the sum of its proper divisors (238694928).

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

131281392 is a wasteful number, since it uses less digits than its factorization.

131281392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248661 (or 248655 counting only the distinct ones).

The product of its digits is 2592, while the sum is 30.

The square root of 131281392 is about 11457.8092146797. The cubic root of 131281392 is about 508.2386916404.

The spelling of 131281392 in words is "one hundred thirty-one million, two hundred eighty-one thousand, three hundred ninety-two".