Is 1551 is a composite number or not ?
- As we already know that, the number having factors 1 and the number itself is the prime number.
- And numbers having more than these two factors are the composite numbers.
- To check whether the number 1551 is composite or not first we have to find its factors.
Contents
Factors of 1551:
- If we have taken numbers from 1, 2, 3…for checking factors of 1551, we found that 1551 has factors 1, 3, 11, 33, 47, 141, 517 and 1551. Hence, we must say that 1551 is a composite number.
- Thus, 1551 is the composite number.
- If we multiply 1551 by 1, 2, 3 then we get the multiples of 1551 which are 1551, 3002 and so on.
1551 is a Composite number or Prime number
About the number 1551:
- 1551 has more than two factors which are 1, 3, 11, 33, 47, 141, 517 and 1551 and hence it is the composite number.
- 1551 is the odd composite number and it is not the perfect square also.
- If we divide 1551 by 1, 3, 11, 33, 47, 141, 517 and 1551 then we get remainder as zero. Hence, 1, 3, 11, 33, 47, 141, 517 and 1551 are the factors of 1551
Note:
- 1551 is not the perfect square.
- Factors of 1551: 1, 3, 11, 33, 47, 141, 517 and 1551
- Prime factors of 1551: 3, 11, 47
Conclusion:
- 1551 is the composite number which has factors 1, 3, 11, 33, 47, 141, 517 and 1551.
- And hence, 1551 is not the prime number.
Multiple Choice Questions:
1) 1551 is a
a) Even number
b) Prime number
c) Composite number
d) Both a and c
Ans: c) composite number
2) The non-prime factors of a composite number 1551 are
a) 1
b) 3, 11, 47
c) 1, 33, 141, 517 and 1551
d) 1, 3, 11, 33, 47, 141, 517 and 1551
Ans: b) 1, 33, 141, 517 and 1551
3) 1551 is the odd composite number because
a) It has factors 1, 3, 11, 33, 47, 141, 517 and 1551
b) It has more than two factors
c) It is not divisible by 2
d) all
Ans: d) all