Q: What is the digital root of 100,251,217

 A: 1

Why is 1 the digital root of the number 100,251,217?

The digital root of a number is calculated by splitting the digits of a number and then adding them together. You keep splitting and adding the digits until you reach a single positive number.

How do you calculate the digital root of 100,251,217?


Split the number up and add each digit together:


1 + 0 + 0 + 2 + 5 + 1 + 2 + 1 + 7 = 19

If the answer is more than one digit, you would add each digit of the answer together again:

1 + 9 = 10

The answer is more than one digit again, we need to add each digit one more time:

1 + 0 = 1

What is the digital root of number 100,251,217?

Answer: 1


More Examples

Number 100,251,215100,251,216100,251,218100,251,219
Digital Root 8923

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