1331131444 has 12 divisors (see below), whose sum is σ = 2404624768. Its totient is φ = 644095800.

The previous prime is 1331131427. The next prime is 1331131453. The reversal of 1331131444 is 4441311331.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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, 5367342 + ... + 5367589.

Almost surely, 2^1331131444 is an apocalyptic number.

It is an amenable number.

1331131444 is a deficient number, since it is larger than the sum of its proper divisors (1073493324).

1331131444 is a wasteful number, since it uses less digits than its factorization.

1331131444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10734966 (or 10734964 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

The square root of 1331131444 is about 36484.6740974892. The cubic root of 1331131444 is about 1100.0362092764.

Adding to 1331131444 its reverse (4441311331), we get a palindrome (5772442775).

The spelling of 1331131444 in words is "one billion, three hundred thirty-one million, one hundred thirty-one thousand, four hundred forty-four".