1311343043 has 8 divisors (see below), whose sum is σ = 1319236800. Its totient is φ = 1303472808.

The previous prime is 1311343037. The next prime is 1311343051. The reversal of 1311343043 is 3403431131.

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 1311343043 - 2¹² = 1311338947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311343063) 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, 113048 + ... + 124106.

It is an arithmetic number, because the mean of its divisors is an integer number (164904600).

Almost surely, 2^1311343043 is an apocalyptic number.

1311343043 is a deficient number, since it is larger than the sum of its proper divisors (7893757).

1311343043 is a wasteful number, since it uses less digits than its factorization.

1311343043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11761.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 1311343043 is about 36212.4708215278. The cubic root of 1311343043 is about 1094.5579814883.

Adding to 1311343043 its reverse (3403431131), we get a palindrome (4714774174).

The spelling of 1311343043 in words is "one billion, three hundred eleven million, three hundred forty-three thousand, forty-three".