131230331 has 4 divisors (see below), whose sum is σ = 131542464. Its totient is φ = 130918200.

The previous prime is 131230303. The next prime is 131230339. The reversal of 131230331 is 133032131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133032131 = 37 ⋅3595463.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131230331 is a prime.

It is a super-2 number, since 2×131230331² = 34442799548739122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131230339) 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 3 ways as a sum of consecutive naturals, for example, 155435 + ... + 156276.

It is an arithmetic number, because the mean of its divisors is an integer number (32885616).

Almost surely, 2^131230331 is an apocalyptic number.

131230331 is a deficient number, since it is larger than the sum of its proper divisors (312133).

131230331 is an equidigital number, since it uses as much as digits as its factorization.

131230331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312132.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 131230331 is about 11455.5807796899. The cubic root of 131230331 is about 508.1727911075.

Adding to 131230331 its reverse (133032131), we get a palindrome (264262462).

The spelling of 131230331 in words is "one hundred thirty-one million, two hundred thirty thousand, three hundred thirty-one".