131324231 has 4 divisors (see below), whose sum is σ = 131369232. Its totient is φ = 131279232.

The previous prime is 131324213. The next prime is 131324233. The reversal of 131324231 is 132423131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132423131 = 61 ⋅2170871.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131324231 is a prime.

It is a super-2 number, since 2×131324231² = 34492107295482722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131324233) 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, 17795 + ... + 24068.

It is an arithmetic number, because the mean of its divisors is an integer number (32842308).

Almost surely, 2^131324231 is an apocalyptic number.

131324231 is a deficient number, since it is larger than the sum of its proper divisors (45001).

131324231 is an equidigital number, since it uses as much as digits as its factorization.

131324231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45000.

The product of its digits is 432, while the sum is 20.

The square root of 131324231 is about 11459.6784858913. The cubic root of 131324231 is about 508.2939674852.

Adding to 131324231 its reverse (132423131), we get a palindrome (263747362).

The spelling of 131324231 in words is "one hundred thirty-one million, three hundred twenty-four thousand, two hundred thirty-one".