1311324443 has 32 divisors (see below), whose sum is σ = 1587769344. Its totient is φ = 1067040000.

The previous prime is 1311324419. The next prime is 1311324457. The reversal of 1311324443 is 3444231131.

It is a happy number.

It is not a de Polignac number, because 1311324443 - 2⁸ = 1311324187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311324493) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1119248 + ... + 1120418.

It is an arithmetic number, because the mean of its divisors is an integer number (49617792).

Almost surely, 2^1311324443 is an apocalyptic number.

1311324443 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1311324443 is a deficient number, since it is larger than the sum of its proper divisors (276444901).

1311324443 is a wasteful number, since it uses less digits than its factorization.

1311324443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427.

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

The square root of 1311324443 is about 36212.2140030129. The cubic root of 1311324443 is about 1094.5528064186.

Adding to 1311324443 its reverse (3444231131), we get a palindrome (4755555574).

The spelling of 1311324443 in words is "one billion, three hundred eleven million, three hundred twenty-four thousand, four hundred forty-three".