131985231 has 8 divisors (see below), whose sum is σ = 201120384. Its totient is φ = 75420120.

The previous prime is 131985193. The next prime is 131985233. The reversal of 131985231 is 132589131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131985231 - 2⁶ = 131985167 is a prime.

It is a super-2 number, since 2×131985231² = 34840202404246722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 131985192 and 131985201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131985233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3142485 + ... + 3142526.

It is an arithmetic number, because the mean of its divisors is an integer number (25140048).

Almost surely, 2^131985231 is an apocalyptic number.

131985231 is a deficient number, since it is larger than the sum of its proper divisors (69135153).

131985231 is an equidigital number, since it uses as much as digits as its factorization.

131985231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6285021.

The product of its digits is 6480, while the sum is 33.

The square root of 131985231 is about 11488.4825368714. The cubic root of 131985231 is about 509.1453467423.

The spelling of 131985231 in words is "one hundred thirty-one million, nine hundred eighty-five thousand, two hundred thirty-one".