1311030343 has 12 divisors (see below), whose sum is σ = 1581332880. Its totient is φ = 1064594016.

The previous prime is 1311030341. The next prime is 1311030349. The reversal of 1311030343 is 3430301131.

It is not a de Polignac number, because 1311030343 - 2¹ = 1311030341 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1311030343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311030341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 256878 + ... + 261931.

It is an arithmetic number, because the mean of its divisors is an integer number (131777740).

Almost surely, 2^1311030343 is an apocalyptic number.

1311030343 is a deficient number, since it is larger than the sum of its proper divisors (270302537).

1311030343 is an equidigital number, since it uses as much as digits as its factorization.

1311030343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518854 (or 518835 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 1311030343 is about 36208.1529907285. The cubic root of 1311030343 is about 1094.4709726028.

Adding to 1311030343 its reverse (3430301131), we get a palindrome (4741331474).

The spelling of 1311030343 in words is "one billion, three hundred eleven million, thirty thousand, three hundred forty-three".