1311331332 has 12 divisors (see below), whose sum is σ = 3059773136. Its totient is φ = 437110440.

The previous prime is 1311331321. The next prime is 1311331337. The reversal of 1311331332 is 2331331131.

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

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1311331299 and 1311331308.

It is not an unprimeable number, because it can be changed into a prime (1311331337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54638794 + ... + 54638817.

Almost surely, 2^1311331332 is an apocalyptic number.

1311331332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1311331332 is an abundant number, since it is smaller than the sum of its proper divisors (1748441804).

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

1311331332 is a wasteful number, since it uses less digits than its factorization.

1311331332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109277618 (or 109277616 counting only the distinct ones).

The product of its digits is 486, while the sum is 21.

The square root of 1311331332 is about 36212.3091227279. The cubic root of 1311331332 is about 1094.5547231477.

Adding to 1311331332 its reverse (2331331131), we get a palindrome (3642662463).

The spelling of 1311331332 in words is "one billion, three hundred eleven million, three hundred thirty-one thousand, three hundred thirty-two".