If you have messy data that includes both numbers and letters in the same cell but want to separate the numbers from the letters, you can use Flash Fill. Flash Fill is built into Excel 2013, 2016 and presumably every future version.
Flash Fill typically populates cells automatically (like and autocorrect function) but if the pattern established in adjacent cells is odd, you might have force it, which is pretty easy.
Watch our two minute video explanation of how to separate letters from numbers in Excel
If you have more complex issues trying to separate numbers from text in Excel columns, our explanation of how to make this happen using a formula might be just the trick you were looking for.