if you could fold a piece of paper 51 times, it could reach the sun. is this true?

When you fold a piece of paper, it doubles in width. If you double it 51 times:  2⁵¹  ≈  2.25 x 10¹⁵.

A sheet of paper is approximately 0.1 mm.

0.1 mm x 2.25 x 10¹⁵  

=  2.25 x 10¹⁴ mm      (multiply by 0.1)

=  2.25 x 10¹³ cm        (divide by 10)

=  2.25 x 10¹¹ m         (divide by 100)

=  2.25 x 10⁸ km         (divide by 1000)

=  225, 000, 000  km

The distance from the earth to the sum is approximately  149, 600, 000 km

It's pretty much impossible to fold a piece of paper more than about eight times, so the question is pointless.

Now that is amazing!