1311312303 has 48 divisors (see below), whose sum is σ = 2316121600. Its totient is φ = 698207040.

The previous prime is 1311312283. The next prime is 1311312313. The reversal of 1311312303 is 3032131131.

It is a happy number.

It is not a de Polignac number, because 1311312303 - 2²⁰ = 1310263727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311312313) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 64038 + ... + 81996.

Almost surely, 2^1311312303 is an apocalyptic number.

1311312303 is a deficient number, since it is larger than the sum of its proper divisors (1004809297).

1311312303 is a wasteful number, since it uses less digits than its factorization.

1311312303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18052 (or 18049 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 1311312303 is about 36212.0463796235. The cubic root of 1311312303 is about 1094.5494286855.

Adding to 1311312303 its reverse (3032131131), we get a palindrome (4343443434).

The spelling of 1311312303 in words is "one billion, three hundred eleven million, three hundred twelve thousand, three hundred three".