Is 153 a deficient number and what is its deficiency?

Is 153 a deficient number?

Here we will explain and calculate if 153 is a deficient number and its deficiency if applicable.

153 is a deficient number if the sum of its proper divisors is less than 153.

The sum of its proper divisors is calculated as follows: 1 + 3 + 9 + 17 + 51 = 81.

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

The deficiency of 153 is 153 minus the sum of its proper divisors. Thus, the deficiency of 153 is 153 - 81 = 72

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