

I’m surprised that got through the vetting process, which I thought existed in most places.
Here in the UK, potentially offensive plates are altered or just plain skipped. There was a sitcom in the '90s that used one such “illegal” plate as an end-of-episode visual punchline, which had, up to that point, only been referred to as a “pornographic number plate”. There’s no way it would have made it onto the road in reality. P one five five OLE as I recall.
To give you some idea of how stringent it is here, back in 2007, one region had one of their region codes temporarily changed to TN from SN so that their plates wouldn’t start with “SN07”, i.e. “snot”. Something similar almost certainly happened in 2017 for the SH region code, but I don’t remember any news stories about that.
Sounds like you have some aspect of synaesthesia, but there’s no way to be completely sure about that. Numbers usually come with attached context, which may even be specific to the individual, and can affect how people feel about them whether they have crossed senses or not.
As for me, uh. I like numbers, but I think if I had any feelings about specific ones, practical concerns have long since overridden any of that, so my feelings can’t have been that strong in the first place.
Practical concerns like a preferred number being too quiet or too loud on a volume setting, for example, which people often cite as having to be on certain values with certain properties. Likewise, temperature settings, where that’s even possible to control in the first place.