131281656 has 32 divisors (see below), whose sum is σ = 358041600. Its totient is φ = 39782240.

The previous prime is 131281613. The next prime is 131281679. The reversal of 131281656 is 656182131.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248376 + ... + 248903.

It is an arithmetic number, because the mean of its divisors is an integer number (11188800).

Almost surely, 2^131281656 is an apocalyptic number.

It is an amenable number.

131281656 is an abundant number, since it is smaller than the sum of its proper divisors (226759944).

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

131281656 is a wasteful number, since it uses less digits than its factorization.

131281656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497299 (or 497295 counting only the distinct ones).

The product of its digits is 8640, while the sum is 33.

The square root of 131281656 is about 11457.8207352009. The cubic root of 131281656 is about 508.2390323207.

The spelling of 131281656 in words is "one hundred thirty-one million, two hundred eighty-one thousand, six hundred fifty-six".