Is 231 a deficient number and what is its deficiency?

Is 231 a deficient number?

Here we will explain and calculate if 231 is a deficient number and its deficiency if applicable.

231 is a deficient number if the sum of its proper divisors is less than 231.

The sum of its proper divisors is calculated as follows: 1 + 3 + 7 + 11 + 21 + 33 + 77 = 153.

153 is less than 231. Therefore, 231 is a deficient number.

The deficiency of 231 is 231 minus the sum of its proper divisors. Thus, the deficiency of 231 is 231 - 153 = 78

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