What is the value of quantum numbers (n, l, ml, ms) of 2p^3?

First digit of the 2p^3 gives you value of n, in this case its = 2, So, n = 2

Second alphabet gives you the value of l,

l=0 = s

l=1 = p

l=3=d

l=4=f

since "p" is the alphabet in 2p^3, so in your case lt shoudlbe = 1 right?

ml = - l to + l, that is - 1, 0, + 1

Ms = + 1/2 or - 1/2 alaways remains same foe evrything.