I dunno about 55 times more... Earth escape velocity is 11.2 km/s or 25,000 mph in your preferred units. And you don't have to go backwards relative to earths

I dunno about 55 times more... Earth escape velocity is 11.2 km/s or 25,000 mph in your preferred units. And you don't have to go backwards relative to earths orbit and cancel it out, you can maintain earths' solar orbit and degrade it. You only need enough energy to reach L1 and since human time scales are irrelevant you can do that as efficiently as you like. After you reach slightly past L1, the sun will do the rest of the work. At closest approach, Mars is 54 million km away. L1 is typically 1.5 million km away. Even ignoring the fact that human timescales are irrelevant, it is a significantly easier journey. You are probably thinking of speeds required to orbitally maneuver near the sun, as we typically do with instruments... A trip straight into the sun is substantially easier than mars.