1311233512 has 16 divisors (see below), whose sum is σ = 2459342340. Its totient is φ = 655408896.

The previous prime is 1311233507. The next prime is 1311233513. The reversal of 1311233512 is 2153321131.

It can be written as a sum of positive squares in 2 ways, for example, as 1115960836 + 195272676 = 33406^2 + 13974^2 .

It is not an unprimeable number, because it can be changed into a prime (1311233513) 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, 2688 + ... + 51280.

Almost surely, 2^1311233512 is an apocalyptic number.

It is an amenable number.

1311233512 is a deficient number, since it is larger than the sum of its proper divisors (1148108828).

1311233512 is a wasteful number, since it uses less digits than its factorization.

1311233512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51972 (or 51968 counting only the distinct ones).

The product of its digits is 540, while the sum is 22.

The square root of 1311233512 is about 36210.9584518278. The cubic root of 1311233512 is about 1094.5275060229.

Adding to 1311233512 its reverse (2153321131), we get a palindrome (3464554643).

The spelling of 1311233512 in words is "one billion, three hundred eleven million, two hundred thirty-three thousand, five hundred twelve".