1311013343 has 16 divisors (see below), whose sum is σ = 1372492800. Its totient is φ = 1250821440.

The previous prime is 1311013331. The next prime is 1311013349. The reversal of 1311013343 is 3433101131.

It is a cyclic number.

It is not a de Polignac number, because 1311013343 - 2²⁴ = 1294236127 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 (1311013349) 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, 1773668 + ... + 1774406.

It is an arithmetic number, because the mean of its divisors is an integer number (85780800).

Almost surely, 2^1311013343 is an apocalyptic number.

1311013343 is a deficient number, since it is larger than the sum of its proper divisors (61479457).

1311013343 is an equidigital number, since it uses as much as digits as its factorization.

1311013343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1502.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 1311013343 is about 36207.9182362091. The cubic root of 1311013343 is about 1094.4662419503.

Adding to 1311013343 its reverse (3433101131), we get a palindrome (4744114474).

The spelling of 1311013343 in words is "one billion, three hundred eleven million, thirteen thousand, three hundred forty-three".