1311315343 has 16 divisors (see below), whose sum is σ = 1489892320. Its totient is φ = 1144129536.

The previous prime is 1311315329. The next prime is 1311315361. The reversal of 1311315343 is 3435131131.

It is a de Polignac number, because none of the positive numbers 2^k-1311315343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311315323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107071 + ... + 118687.

It is an arithmetic number, because the mean of its divisors is an integer number (93118270).

Almost surely, 2^1311315343 is an apocalyptic number.

1311315343 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1311315343 is a deficient number, since it is larger than the sum of its proper divisors (178576977).

1311315343 is a wasteful number, since it uses less digits than its factorization.

1311315343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12106.

The product of its digits is 1620, while the sum is 25.

The square root of 1311315343 is about 36212.0883545813. The cubic root of 1311315343 is about 1094.5502745119.

Adding to 1311315343 its reverse (3435131131), we get a palindrome (4746446474).

The spelling of 1311315343 in words is "one billion, three hundred eleven million, three hundred fifteen thousand, three hundred forty-three".