It is not. 621 is divisible by 3, not the other way round.
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621 is divisible by these numbers: 1, 3, 9, 23, 27, 69, 207, 621.
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Oh, dude, let's break it down. So, 621 is divisible by 2 because it's an even number. It's not divisible by 3 because the sum of its digits isn't a multiple of 3. It's not divisible by 4 because the last two digits aren't divisible by 4. It's not divisible by 5 because it doesn't end in 0 or 5. It's not divisible by 6 because it's not divisible by both 2 and 3. And it's not divisible by 10 because it doesn't end in 0. So, like, that's the scoop!
As 4 is less than 621, 4 is not divisible by 621. Nor is 621 divisible by 4: 4 is even and all multiples of 4 are even, 621 is odd and so cannot be a multiple of 4. To check divisibility by 4, if the the last 2 digits are divisible by 4, the original number is divisible by 4. For 621, the last 2 digits are 21 and 21 is not divisible by 4, thus 621 is not divisible by 4; nor is 622 since the last 2 digits 22 is not divisible by 4.
Yes, exactly 207 times