1311330331 has 2 divisors, whose sum is σ = 1311330332. Its totient is φ = 1311330330.

The previous prime is 1311330271. The next prime is 1311330367. The reversal of 1311330331 is 1330331131.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1330331131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1311330331 - 2⁷ = 1311330203 is a prime.

It is a super-2 number, since 2×1311330331² = 3439174474001139122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1311330299 and 1311330308.

It is not a weakly prime, because it can be changed into another prime (1311330731) by changing a digit.

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 as a sum of consecutive naturals, namely, 655665165 + 655665166.

It is an arithmetic number, because the mean of its divisors is an integer number (655665166).

Almost surely, 2^1311330331 is an apocalyptic number.

1311330331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311330331 is an equidigital number, since it uses as much as digits as its factorization.

1311330331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 243, while the sum is 19.

The square root of 1311330331 is about 36212.2953014580. The cubic root of 1311330331 is about 1094.5544446395.

Adding to 1311330331 its reverse (1330331131), we get a palindrome (2641661462).

The spelling of 1311330331 in words is "one billion, three hundred eleven million, three hundred thirty thousand, three hundred thirty-one".