1311715543 has 2 divisors, whose sum is σ = 1311715544. Its totient is φ = 1311715542.

The previous prime is 1311715519. The next prime is 1311715549. The reversal of 1311715543 is 3455171131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1311715543 - 2¹⁷ = 1311584471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311715549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655857771 + 655857772.

It is an arithmetic number, because the mean of its divisors is an integer number (655857772).

Almost surely, 2^1311715543 is an apocalyptic number.

1311715543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311715543 is an equidigital number, since it uses as much as digits as its factorization.

1311715543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6300, while the sum is 31.

The square root of 1311715543 is about 36217.6137121153. The cubic root of 1311715543 is about 1094.6616116941.

Adding to 1311715543 its reverse (3455171131), we get a palindrome (4766886674).

The spelling of 1311715543 in words is "one billion, three hundred eleven million, seven hundred fifteen thousand, five hundred forty-three".