1311331244 has 24 divisors (see below), whose sum is σ = 2443267008. Its totient is φ = 613681920.

The previous prime is 1311331237. The next prime is 1311331271. The reversal of 1311331244 is 4421331131.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40964 + ... + 65579.

It is an arithmetic number, because the mean of its divisors is an integer number (101802792).

Almost surely, 2^1311331244 is an apocalyptic number.

It is an amenable number.

1311331244 is a deficient number, since it is larger than the sum of its proper divisors (1131935764).

1311331244 is a wasteful number, since it uses less digits than its factorization.

1311331244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106745 (or 106743 counting only the distinct ones).

The product of its digits is 864, while the sum is 23.

The square root of 1311331244 is about 36212.3079076714. The cubic root of 1311331244 is about 1094.5546986635.

Adding to 1311331244 its reverse (4421331131), we get a palindrome (5732662375).

The spelling of 1311331244 in words is "one billion, three hundred eleven million, three hundred thirty-one thousand, two hundred forty-four".