1311332303 has 4 divisors (see below), whose sum is σ = 1315999248. Its totient is φ = 1306665360.

The previous prime is 1311332293. The next prime is 1311332317. The reversal of 1311332303 is 3032331131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1311332303 - 2⁴ = 1311332287 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 (1311332003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2333051 + ... + 2333612.

It is an arithmetic number, because the mean of its divisors is an integer number (328999812).

Almost surely, 2^1311332303 is an apocalyptic number.

1311332303 is a deficient number, since it is larger than the sum of its proper divisors (4666945).

1311332303 is an equidigital number, since it uses as much as digits as its factorization.

1311332303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4666944.

The product of its (nonzero) digits is 486, while the sum is 20.

The square root of 1311332303 is about 36212.3225297688. The cubic root of 1311332303 is about 1094.5549933089.

Adding to 1311332303 its reverse (3032331131), we get a palindrome (4343663434).

The spelling of 1311332303 in words is "one billion, three hundred eleven million, three hundred thirty-two thousand, three hundred three".