131686225 has 24 divisors (see below), whose sum is σ = 178738560. Its totient is φ = 95448000.

The previous prime is 131686193. The next prime is 131686229. The reversal of 131686225 is 522686131.

It is not a de Polignac number, because 131686225 - 2⁵ = 131686193 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (131686229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 106360 + ... + 107590.

It is an arithmetic number, because the mean of its divisors is an integer number (7447440).

Almost surely, 2^131686225 is an apocalyptic number.

It is an amenable number.

131686225 is a deficient number, since it is larger than the sum of its proper divisors (47052335).

131686225 is a wasteful number, since it uses less digits than its factorization.

131686225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1641 (or 1636 counting only the distinct ones).

The product of its digits is 17280, while the sum is 34.

The square root of 131686225 is about 11475.4618643434. The cubic root of 131686225 is about 508.7605748516.

The spelling of 131686225 in words is "one hundred thirty-one million, six hundred eighty-six thousand, two hundred twenty-five".