1311311303 has 16 divisors (see below), whose sum is σ = 1402336800. Its totient is φ = 1221888000.

The previous prime is 1311311291. The next prime is 1311311317. The reversal of 1311311303 is 3031131131.

It is a cyclic number.

It is not a de Polignac number, because 1311311303 - 2¹⁰ = 1311310279 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311311333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1015088 + ... + 1016378.

It is an arithmetic number, because the mean of its divisors is an integer number (87646050).

Almost surely, 2^1311311303 is an apocalyptic number.

1311311303 is a deficient number, since it is larger than the sum of its proper divisors (91025497).

1311311303 is a wasteful number, since it uses less digits than its factorization.

1311311303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1858.

The product of its (nonzero) digits is 81, while the sum is 17.

The square root of 1311311303 is about 36212.0325720609. The cubic root of 1311311303 is about 1094.5491504528.

Adding to 1311311303 its reverse (3031131131), we get a palindrome (4342442434).

The spelling of 1311311303 in words is "one billion, three hundred eleven million, three hundred eleven thousand, three hundred three".