131530143 has 4 divisors (see below), whose sum is σ = 175373528. Its totient is φ = 87686760.

The previous prime is 131530129. The next prime is 131530171. The reversal of 131530143 is 341035131.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 131530143 - 2⁹ = 131529631 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 (131530843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21921688 + ... + 21921693.

It is an arithmetic number, because the mean of its divisors is an integer number (43843382).

Almost surely, 2^131530143 is an apocalyptic number.

131530143 is a deficient number, since it is larger than the sum of its proper divisors (43843385).

131530143 is an equidigital number, since it uses as much as digits as its factorization.

131530143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43843384.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 131530143 is about 11468.6591631280. The cubic root of 131530143 is about 508.5594914003.

Adding to 131530143 its reverse (341035131), we get a palindrome (472565274).

The spelling of 131530143 in words is "one hundred thirty-one million, five hundred thirty thousand, one hundred forty-three".