1311263303 has 8 divisors (see below), whose sum is σ = 1519115808. Its totient is φ = 1108543104.

The previous prime is 1311263269. The next prime is 1311263341. The reversal of 1311263303 is 3033621131.

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 1311263303 - 2⁸ = 1311263047 is a prime.

It is a super-2 number, since 2×1311263303² = 3438822899588939618, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311263383) 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 in 7 ways as a sum of consecutive naturals, for example, 1282526 + ... + 1283547.

It is an arithmetic number, because the mean of its divisors is an integer number (189889476).

Almost surely, 2^1311263303 is an apocalyptic number.

1311263303 is a deficient number, since it is larger than the sum of its proper divisors (207852505).

1311263303 is an equidigital number, since it uses as much as digits as its factorization.

1311263303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2566153.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 1311263303 is about 36211.3698028672. The cubic root of 1311263303 is about 1094.5357951191.

Adding to 1311263303 its reverse (3033621131), we get a palindrome (4344884434).

The spelling of 1311263303 in words is "one billion, three hundred eleven million, two hundred sixty-three thousand, three hundred three".