What is 3 to the power of 15 ?What is 3 to the power of 15 ?Solution: 315 = 14,348,907simplify this: All that is needed is to multiply it out:3 x 3 x 3 x 3 x 3 x 3 x 3 x 3 x 3 x 3 x 3 x 3 x 3 x 3 x 3 = 14,348,907 So, 3 to the power of 15 is 14,348,907.