Why did Aragorn live so long?

The royal blood that flows through the veins of the Dúnedain allows them to live three times as long as normal Men. Aragorn’s heritage is the reason for his longevity, and he’s not the only Lord of the Rings character to benefit from being one of the Dúnedain.

How did Aragorn die in Lord of the Rings?

At the age of 210, Aragorn felt that he had lived enough life and wisely chose to die. As a descendent of the Númenoreans, a legendary and virile breed of man, Aragorn could choose when he wanted to die, without the need to carry out a violent suicide.