131281612 has 36 divisors (see below), whose sum is σ = 288610000. Its totient is φ = 51147360.

The previous prime is 131281607. The next prime is 131281613. The reversal of 131281612 is 216182131.

It is not an unprimeable number, because it can be changed into a prime (131281613) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15987 + ... + 22762.

Almost surely, 2^131281612 is an apocalyptic number.

It is an amenable number.

131281612 is an abundant number, since it is smaller than the sum of its proper divisors (157328388).

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

131281612 is a wasteful number, since it uses less digits than its factorization.

131281612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38782 (or 38769 counting only the distinct ones).

The product of its digits is 576, while the sum is 25.

The square root of 131281612 is about 11457.8188151149. The cubic root of 131281612 is about 508.2389755406.

The spelling of 131281612 in words is "one hundred thirty-one million, two hundred eighty-one thousand, six hundred twelve".