Prime Numbers

# Is 15579 a prime number?

001

15579 is not a Prime number. Here's how: The sum of its digits is 27. As 3 is a factor of 27, it is also a factor of 15579. 15579/3 = 5193. Note that it can be further divided by 3.

Thus, 15579 is a composite number. Please see the related links for ways to check whether other numbers are divisible by small integers.

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