Yes -213 is an integer because it is a whole number
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The factor pairs of 21 are:1, 213, 7Therefore, the number 21 has two pairs of positive integer factors.
85% of 213 = 85% * 213 = 0.85 * 213 = 181.05
213 - 0.4*213 = 213 - 85.2 = 127.8
The only composite factor of 213 is 213.
1, 3, 213