131331143 has 4 divisors (see below), whose sum is σ = 131707800. Its totient is φ = 130954488.

The previous prime is 131331139. The next prime is 131331181. The reversal of 131331143 is 341133131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 341133131 = 9601 ⋅35531.

It is a cyclic number.

It is not a de Polignac number, because 131331143 - 2² = 131331139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131361143) 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, 187805 + ... + 188502.

It is an arithmetic number, because the mean of its divisors is an integer number (32926950).

Almost surely, 2^131331143 is an apocalyptic number.

131331143 is a deficient number, since it is larger than the sum of its proper divisors (376657).

131331143 is an equidigital number, since it uses as much as digits as its factorization.

131331143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376656.

The product of its digits is 324, while the sum is 20.

The square root of 131331143 is about 11459.9800610647. The cubic root of 131331143 is about 508.3028850227.

Adding to 131331143 its reverse (341133131), we get a palindrome (472464274).

The spelling of 131331143 in words is "one hundred thirty-one million, three hundred thirty-one thousand, one hundred forty-three".