Well, with no investments at all that means we are looking at it's very minimum, so being that you didn't give a Nature we'll say it's hindering so I know which number to work with which is 94 Speed with no Ivs/Evs whatsoever. So:
94 x 1.5 = 141
So that means any Pokemon with Speed greater than 141 will outspeed your Azumarill in this instance.
So hope I've Helped! :)