1311344243 has 8 divisors (see below), whose sum is σ = 1479887280. Its totient is φ = 1151022880.

The previous prime is 1311344219. The next prime is 1311344257. The reversal of 1311344243 is 3424431131.

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 1311344243 - 2⁸ = 1311343987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311344213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2055080 + ... + 2055717.

It is an arithmetic number, because the mean of its divisors is an integer number (184985910).

Almost surely, 2^1311344243 is an apocalyptic number.

1311344243 is a deficient number, since it is larger than the sum of its proper divisors (168543037).

1311344243 is a wasteful number, since it uses less digits than its factorization.

1311344243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4110837.

The product of its digits is 3456, while the sum is 26.

The square root of 1311344243 is about 36212.4873904017. The cubic root of 1311344243 is about 1094.5583153620.

Adding to 1311344243 its reverse (3424431131), we get a palindrome (4735775374).

The spelling of 1311344243 in words is "one billion, three hundred eleven million, three hundred forty-four thousand, two hundred forty-three".