What is the formula for Potential energy of an electron?

In physics, the potential energy is energy possessed by a body by virtue of its position relative to others, stresses within itself, electric charge, and other factors.

P.E. = -e² / 4πε₀r = m e⁴ / 4 ε₀² n² h²

ε₀ = permittivity of free space

e = Charge on an electron (1.6 x 10–19 C)

r = radius of the orbit of an electron

m= mass of an electron

n = positive integer

h = Planck’s constant