131188281 has 8 divisors (see below), whose sum is σ = 199905984. Its totient is φ = 74964720.

The previous prime is 131188279. The next prime is 131188283. The reversal of 131188281 is 182881131.

It is an interprime number because it is at equal distance from previous prime (131188279) and next prime (131188283).

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

It is not a de Polignac number, because 131188281 - 2¹ = 131188279 is a prime.

It is a super-2 number, since 2×131188281² = 34420730143469922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (131188283) 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, 3123510 + ... + 3123551.

It is an arithmetic number, because the mean of its divisors is an integer number (24988248).

Almost surely, 2^131188281 is an apocalyptic number.

It is an amenable number.

131188281 is a deficient number, since it is larger than the sum of its proper divisors (68717703).

131188281 is an equidigital number, since it uses as much as digits as its factorization.

131188281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6247071.

The product of its digits is 3072, while the sum is 33.

The square root of 131188281 is about 11453.7452826575. The cubic root of 131188281 is about 508.1185075475.

The spelling of 131188281 in words is "one hundred thirty-one million, one hundred eighty-eight thousand, two hundred eighty-one".