6531341811209 has 2 divisors, whose sum is σ = 6531341811210. Its totient is φ = 6531341811208.

The previous prime is 6531341811191. The next prime is 6531341811217. The reversal of 6531341811209 is 9021181431356.

6531341811209 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5240766289984 + 1290575521225 = 2289272^2 + 1136035^2 .

It is a cyclic number.

It is not a de Polignac number, because 6531341811209 - 2¹⁶ = 6531341745673 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6531341811209.

It is not a weakly prime, because it can be changed into another prime (6531341811299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3265670905604 + 3265670905605.

It is an arithmetic number, because the mean of its divisors is an integer number (3265670905605).

Almost surely, 2^{6531341811209} is an apocalyptic number.

It is an amenable number.

6531341811209 is a deficient number, since it is larger than the sum of its proper divisors (1).

6531341811209 is an equidigital number, since it uses as much as digits as its factorization.

6531341811209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 44.

The spelling of 6531341811209 in words is "six trillion, five hundred thirty-one billion, three hundred forty-one million, eight hundred eleven thousand, two hundred nine".