1311443343 has 48 divisors (see below), whose sum is σ = 2249275392. Its totient is φ = 720720000.

The previous prime is 1311443339. The next prime is 1311443351. The reversal of 1311443343 is 3433441131.

1311443343 is a `hidden beast` number, since 1 + 311 + 4 + 4 + 3 + 343 = 666.

It is not a de Polignac number, because 1311443343 - 2² = 1311443339 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311443443) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 179818 + ... + 186968.

It is an arithmetic number, because the mean of its divisors is an integer number (46859904).

Almost surely, 2^1311443343 is an apocalyptic number.

1311443343 is a deficient number, since it is larger than the sum of its proper divisors (937832049).

1311443343 is a wasteful number, since it uses less digits than its factorization.

1311443343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7276 (or 7273 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 1311443343 is about 36213.8556770748. The cubic root of 1311443343 is about 1094.5858870688.

Adding to 1311443343 its reverse (3433441131), we get a palindrome (4744884474).

The spelling of 1311443343 in words is "one billion, three hundred eleven million, four hundred forty-three thousand, three hundred forty-three".