Q: What is the digital root of 255,917,875

 A: 4

Why is 4 the digital root of the number 255,917,875?

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 255,917,875?


Split the number up and add each digit together:


2 + 5 + 5 + 9 + 1 + 7 + 8 + 7 + 5 = 49

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

4 + 9 = 13

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

1 + 3 = 4

What is the digital root of number 255,917,875?

Answer: 4


More Examples

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Digital Root 2356

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