Is 110 a prime number?
It is possible to find out using mathematical methods whether a given integer is a prime number or not.
For 110, the answer is: No, 110 is not a prime number.
The list of all positive divisors (i.e., the list of all integers that divide 110) is as follows: 1, 2, 5, 10, 11, 22, 55, 110.
For 110 to be a prime number, it would have been required that 110 has only two divisors, i.e., itself and 1.
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Actually, one can immediately see that 110 cannot be prime, because 5 is one of its divisors: indeed, a number ending with 0 or 5 has necessarily 5 among its divisors. The last digit of 110 is 0, so it is divisible by 5 and is therefore not prime.
As a consequence:
- 110 is a multiple of 1
- 110 is a multiple of 2
- 110 is a multiple of 5
- 110 is a multiple of 10
- 110 is a multiple of 11
- 110 is a multiple of 22
- 110 is a multiple of 55
For 110 to be a prime number, it would have been required that 110 has only two divisors, i.e., itself and 1.
Is 110 a deficient number?
Yes, 110 is a deficient number, that is to say 110 is a natural number that is strictly larger than the sum of its proper divisors, i.e., the divisors of 110 without 110 itself (that is 1 + 2 + 5 + 10 + 11 + 22 + 55 = 106).