131309992 has 16 divisors (see below), whose sum is σ = 268588800. Its totient is φ = 59686320.

The previous prime is 131309957. The next prime is 131309993. The reversal of 131309992 is 299903131.

It is not an unprimeable number, because it can be changed into a prime (131309993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 745992 + ... + 746167.

It is an arithmetic number, because the mean of its divisors is an integer number (16786800).

Almost surely, 2^131309992 is an apocalyptic number.

It is an amenable number.

131309992 is an abundant number, since it is smaller than the sum of its proper divisors (137278808).

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

131309992 is a wasteful number, since it uses less digits than its factorization.

131309992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1492176 (or 1492172 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 37.

The square root of 131309992 is about 11459.0572038017. The cubic root of 131309992 is about 508.2755960104.

The spelling of 131309992 in words is "one hundred thirty-one million, three hundred nine thousand, nine hundred ninety-two".