1331431044 has 24 divisors (see below), whose sum is σ = 3108634368. Its totient is φ = 443530080.

The previous prime is 1331431039. The next prime is 1331431081. The reversal of 1331431044 is 4401341331.

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 7 ways as a sum of consecutive naturals, for example, 14772 + ... + 53675.

It is an arithmetic number, because the mean of its divisors is an integer number (129526432).

Almost surely, 2^1331431044 is an apocalyptic number.

It is an amenable number.

1331431044 is an abundant number, since it is smaller than the sum of its proper divisors (1777203324).

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

1331431044 is a wasteful number, since it uses less digits than its factorization.

1331431044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70075 (or 70073 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 1331431044 is about 36488.7797000667. The cubic root of 1331431044 is about 1100.1187320874.

Adding to 1331431044 its reverse (4401341331), we get a palindrome (5732772375).

The spelling of 1331431044 in words is "one billion, three hundred thirty-one million, four hundred thirty-one thousand, forty-four".