131989231 has 8 divisors (see below), whose sum is σ = 147337344. Its totient is φ = 117199320.

The previous prime is 131989217. The next prime is 131989243. The reversal of 131989231 is 132989131.

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

It is a cyclic number.

It is not a de Polignac number, because 131989231 - 2⁵ = 131989199 is a prime.

It is a super-2 number, since 2×131989231² = 34842314199942722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131989201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139051 + ... + 139996.

It is an arithmetic number, because the mean of its divisors is an integer number (18417168).

Almost surely, 2^131989231 is an apocalyptic number.

131989231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

131989231 is a deficient number, since it is larger than the sum of its proper divisors (15348113).

131989231 is a wasteful number, since it uses less digits than its factorization.

131989231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279101.

The product of its digits is 11664, while the sum is 37.

The square root of 131989231 is about 11488.6566229477. The cubic root of 131989231 is about 509.1504901481.

The spelling of 131989231 in words is "one hundred thirty-one million, nine hundred eighty-nine thousand, two hundred thirty-one".