131443232 has 24 divisors (see below), whose sum is σ = 259134876. Its totient is φ = 65631232.

The previous prime is 131443219. The next prime is 131443237. The reversal of 131443232 is 232344131.

It can be written as a sum of positive squares in 2 ways, for example, as 105596176 + 25847056 = 10276^2 + 5084^2 .

It is a junction number, because it is equal to n+sod(n) for n = 131443198 and 131443207.

It is not an unprimeable number, because it can be changed into a prime (131443237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25028 + ... + 29820.

Almost surely, 2^131443232 is an apocalyptic number.

It is an amenable number.

131443232 is a deficient number, since it is larger than the sum of its proper divisors (127691644).

131443232 is an equidigital number, since it uses as much as digits as its factorization.

131443232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5660 (or 5652 counting only the distinct ones).

The product of its digits is 1728, while the sum is 23.

The square root of 131443232 is about 11464.8694715640. The cubic root of 131443232 is about 508.4474533237.

Adding to 131443232 its reverse (232344131), we get a palindrome (363787363).

The spelling of 131443232 in words is "one hundred thirty-one million, four hundred forty-three thousand, two hundred thirty-two".