131328631 has 8 divisors (see below), whose sum is σ = 152634240. Its totient is φ = 110659128.

The previous prime is 131328623. The next prime is 131328641. The reversal of 131328631 is 136823131.

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 131328631 - 2³ = 131328623 is a prime.

It is a super-2 number, since 2×131328631² = 34494418640668322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131328631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131328641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158581 + ... + 159406.

It is an arithmetic number, because the mean of its divisors is an integer number (19079280).

Almost surely, 2^131328631 is an apocalyptic number.

131328631 is a deficient number, since it is larger than the sum of its proper divisors (21305609).

131328631 is an equidigital number, since it uses as much as digits as its factorization.

131328631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318053.

The product of its digits is 2592, while the sum is 28.

The square root of 131328631 is about 11459.8704617461. The cubic root of 131328631 is about 508.2996441945.

The spelling of 131328631 in words is "one hundred thirty-one million, three hundred twenty-eight thousand, six hundred thirty-one".