131142433 has 4 divisors (see below), whose sum is σ = 131175748. Its totient is φ = 131109120.

The previous prime is 131142421. The next prime is 131142439. The reversal of 131142433 is 334241131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 87740689 + 43401744 = 9367^2 + 6588^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131142433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131142439) 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, 9816 + ... + 18937.

It is an arithmetic number, because the mean of its divisors is an integer number (32793937).

Almost surely, 2^131142433 is an apocalyptic number.

It is an amenable number.

131142433 is a deficient number, since it is larger than the sum of its proper divisors (33315).

131142433 is an equidigital number, since it uses as much as digits as its factorization.

131142433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33314.

The product of its digits is 864, while the sum is 22.

The square root of 131142433 is about 11451.7436663593. The cubic root of 131142433 is about 508.0593078193.

Adding to 131142433 its reverse (334241131), we get a palindrome (465383564).

The spelling of 131142433 in words is "one hundred thirty-one million, one hundred forty-two thousand, four hundred thirty-three".