1311303331 has 8 divisors (see below), whose sum is σ = 1432063584. Its totient is φ = 1193384640.

The previous prime is 1311303293. The next prime is 1311303341. The reversal of 1311303331 is 1333031131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1311303331 - 2¹⁵ = 1311270563 is a prime.

It is a super-2 number, since 2×1311303331² = 3439032851783391122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1311303299 and 1311303308.

It is not an unprimeable number, because it can be changed into a prime (1311303341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 709426 + ... + 711271.

It is an arithmetic number, because the mean of its divisors is an integer number (179007948).

Almost surely, 2^1311303331 is an apocalyptic number.

1311303331 is a deficient number, since it is larger than the sum of its proper divisors (120760253).

1311303331 is a wasteful number, since it uses less digits than its factorization.

1311303331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1420781.

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

The square root of 1311303331 is about 36211.9224979840. The cubic root of 1311303331 is about 1094.5469323770.

Adding to 1311303331 its reverse (1333031131), we get a palindrome (2644334462).

The spelling of 1311303331 in words is "one billion, three hundred eleven million, three hundred three thousand, three hundred thirty-one".