131665012 has 12 divisors (see below), whose sum is σ = 230626816. Its totient is φ = 65771640.

The previous prime is 131664947. The next prime is 131665019. The reversal of 131665012 is 210566131.

131665012 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131665019) 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, 10164 + ... + 19147.

Almost surely, 2^131665012 is an apocalyptic number.

It is an amenable number.

131665012 is a deficient number, since it is larger than the sum of its proper divisors (98961804).

131665012 is a wasteful number, since it uses less digits than its factorization.

131665012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30438 (or 30436 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 131665012 is about 11474.5375505944. The cubic root of 131665012 is about 508.7332550677.

The spelling of 131665012 in words is "one hundred thirty-one million, six hundred sixty-five thousand, twelve".