palindrome - Word for number or word that reads the same when inverted or mirrored

The number I am thinking of is 80808. This is a palindrome. However, it is more than a palindrome, because it can be flipped or mirrored and will still read the same way.

Is there a word for this?

Answer

There's a term for words written in such a form that they can be read from another viewpoint, direction or orientation. They are called ambigrams. See the relevant Wikipedia article.