Q: What are the prime factors of the number 225,321,525?

 A: 3, 5, 11, 13, 47, 149

Why are those the prime factors of the number 225,321,525?

Prime factors are the prime numbers that can be multipled together to equal the original number. You find the factors by dividing by prime numbers. It is best shown by creating a Factor Tree.

Factor Tree for the number 225,321,525

225,321,525
Factor Arrows
375,107,175
Factor Arrows
325,035,725
Factor Arrows
55,007,145
Factor Arrows
51,001,429
Factor Arrows
1191,039
Factor Arrows
137,003
Factor Arrows
47149

The numbers in bold above are the prime factors. If there are multiples, you only count them one time. This leads us to our prime factors of:

3, 5, 11, 13, 47, 149

We can check our work by multiplying all of the prime factors together: 3 x 3 x 5 x 5 x 11 x 13 x 47 x 149 = 225,321,525

This can also be written as 32 x 52 x 111 x 131 x 471 x 1491 = 225,321,525

If you would like to know more, or need additional explanation, please review our prime factorization explanation.


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