131240443 has 4 divisors (see below), whose sum is σ = 134787520. Its totient is φ = 127693368.

The previous prime is 131240441. The next prime is 131240449. The reversal of 131240443 is 344042131.

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

It is a cyclic number.

It is not a de Polignac number, because 131240443 - 2¹ = 131240441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131240441) 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, 1773483 + ... + 1773556.

It is an arithmetic number, because the mean of its divisors is an integer number (33696880).

Almost surely, 2^131240443 is an apocalyptic number.

131240443 is a deficient number, since it is larger than the sum of its proper divisors (3547077).

131240443 is an equidigital number, since it uses as much as digits as its factorization.

131240443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3547076.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 131240443 is about 11456.0221281211. The cubic root of 131240443 is about 508.1858432509.

Adding to 131240443 its reverse (344042131), we get a palindrome (475282574).

The spelling of 131240443 in words is "one hundred thirty-one million, two hundred forty thousand, four hundred forty-three".