Is 651 a deficient number and what is its deficiency?

Is 651 a deficient number?

Here we will explain and calculate if 651 is a deficient number and its deficiency if applicable.

651 is a deficient number if the sum of its proper divisors is less than 651.

The sum of its proper divisors is calculated as follows: 1 + 3 + 7 + 21 + 31 + 93 + 217 = 373.

373 is less than 651. Therefore, 651 is a deficient number.

The deficiency of 651 is 651 minus the sum of its proper divisors. Thus, the deficiency of 651 is 651 - 373 = 278

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