Hecho general: 5391 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 5391 is an unremarkable number.
Trivia: 5391 is an uninteresting number.
Fecha histórica: October 4th is the day in 1983 that Richard Noble sets a new land speed record of 633.468 mph (1,019 km/h), driving Thrust 2 at the Black Rock Desert of Nevada.