A limp/shove ussually means two things.
A pocket pair, or a pocket pair, or a chopped pot.
Most players don't limp/shove AK in my experience.
It's a pot isolation move, and by the time action gets back to you, you are getting correct pot odds
to call unless your opponent has AA or KK.
I would be calling here all day every day in a cash game unless our villain is particularly tricky. Against a more tricky opponent I have a hard time giving him credit for AA or KK here, so I still call - unless I've seen him make a similar move and think he's doing a repeat.
In a tournament game - weigh the odds against your tournament life. I would call this in most tournaments, knowing I was getting a little better than double my money to flip a coin - if I win I am at almost 2x chip average and get sufficient breathing room. If I lose I made a mathmatically correct play and lost.
This is a 50/50 unless your opponent has AA/KK, in which case it's a WA/WB.
If our villain is terrible he'll pull this move with an A, but I would never expect this.
Call and hope to improve, as you're certainly behind by a couple percent, but math says that's ok, imo.