What I'm asking is is it possible to feel satiated eating 1500 calories a day and doing nothing. And if possible, with which kinds of foods?
At what point in caloric intake does it just become impossible to feel satiated while still doing no activity?
Ex. You can still feel unsatiated throughout the day eating 2000 calories of candy bars. You will feel more satiated eating 2000 calories of normal food.
It's important you figure out your actual daily calorie requirements. The 2000 calorie daily diet is a gross simplification. It's probably in line for someone like a 150lb male, with very sedentary life style. Above that in terms of weight or activity and you'll likely need more calories.
I've always had good luck with Scooby's calculator:
http://scoobysworkshop.com/calorie-calculator/
To calculate your BMR (base metabolic rate- basically calorie consumption at "idle") and then estimate your TDEE (or calories to maintain weight based on your BMR + daily activity)
For me my TDEE is around 2200 (office desk job- no exercise to speak of) so I've been targeting 1700-1800 calories a day and losing ~1/lb a week for about the past year. So about a 500 calorie deficit. Not any real special foods but egg whites and toast in the morning, basic sandwich for lunch, some variant of meat + whole grain dinner. Some snacks in between at 10 am and 2 pm usually protein shake, yogurt, nuts, etc.
If I go out to lunch with friends or something I'll either have half the meal and box the rest or skip dinner or something. Not so much to count calories but mostly because I'm very full after that. Restaurants don't list calories here but I'm guessing it's hard to order a meal with <1k cal a lot of places
If I have days with lots of traveling/activity then have an extra 200 calorie snack or so
I'm definitely comfortable not hungry, however it's pretty close to the point if I miss one of those 10 am or 2 pm snacks my energy will be down.
When I used to hit the gym a lot my diet was closer to 2200 calories and pretty similar energy levels.
I think if you tried to run > 1000 cal deficit to your TDEE then you'd probably be hungry all the time. 500 deficit you might be hungry the first few days but if you stick with it your body will adapt (assuming you've got fat to lose). That's my opinion at least