131340444 has 12 divisors (see below), whose sum is σ = 306461064. Its totient is φ = 43780144.

The previous prime is 131340439. The next prime is 131340457. The reversal of 131340444 is 444043131.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

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, 5472507 + ... + 5472530.

It is an arithmetic number, because the mean of its divisors is an integer number (25538422).

Almost surely, 2^131340444 is an apocalyptic number.

It is an amenable number.

131340444 is an abundant number, since it is smaller than the sum of its proper divisors (175120620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131340444 is a wasteful number, since it uses less digits than its factorization.

131340444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10945044 (or 10945042 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 131340444 is about 11460.3858573785. The cubic root of 131340444 is about 508.3148842419.

Adding to 131340444 its reverse (444043131), we get a palindrome (575383575).

The spelling of 131340444 in words is "one hundred thirty-one million, three hundred forty thousand, four hundred forty-four".