Isaiah's Call
Isaiah's call involves a vision of Yahvah along with seraphim. The question is asked, "Who will go?" Isaiah volunteers, "Here I am, send me." The numbers in the story point at the book of Isaiah.
Isaiah 6
Count
6+2+2+2+1 = 13 = Isaiah
Isaiah
Beyond a possible issue with the count itself, [1] this passage is a profound example of recursive counts. There are a number of other places in the Bible where a count points at the same book as the story providing the count. See John, Matthew and Acts for examples.
Recursive counts appear to reveal a relationship between the passage and the book as a whole. Here, in Isaiah, the prophet's call is told in a short passage that, by the numbers, is related to the whole book. The book, apparently, is an outworking of the call. That, at least, is an obvious way to interpret the relationship and because this interpretation is not difficult to arrive at without the math it's easy to accept.
But more specifically, it's likely the case that what Isaiah is told in miniature in this story is what, in fact, the whole of the book is about, at least generally. So this passage may be an outline for thinking about the book. For example, the point when Isaiah says "Here I am" would be this very passage of the book, but the material prior to this statement would apply, generally, to parts of the book prior to this passage and material following this statement would apply, generally, to parts of the book following this passage. I haven't thought this through carefully, but it's what math in a story like this causes me to wonder.
[1] This is a tentative count because I've ignored the 1/10th reference in this passage for the count to come out at 13 and point at Isaiah. In Bible math fractions often count as a whole number, or 1, so this report could perhaps point at book 14, Jeremiah, but Jeremiah does not seem to match and on the strength of the recursion of Isaiah's call to Isaiah's book and because of some uncertainty about the 1/10th, I've ignored it and written this report as is. I will change this if there's good reason.