In episode The Littlest Giant (1982) Pappa Smurf says his full age is 553 years old. In this episode he tells the king he is 542 years old.
In "The Good, the Bad, and the Smurfy," Papa Smurf is instructing the wizard Mordaine on ingredients for a toad spell and one of its ingredients he mentioned is three sarsaparilla leaves. However, sarsaparilla (a tropical green-brier native to the Americas), was unknown to Europeans until the 16th century. The background of the Smurfs cartoon series is the late Middle Ages (circa 14-15th century), too early for the European understanding of sarsaparilla.