Digit Sum Calculator

Sum of digits & digital root

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About Digit Sum Calculator

A digit sum calculator that computes the sum of digits, digital root (repeated digit sum until single digit), alternating digit sum, digit product, and digit frequency. Supports any number. Shows iterative reduction steps. All calculations are client-side. Essential for number theory, divisibility tests, and recreational mathematics.

Digit Sum Calculator Features

  • Digit sum
  • Digital root
  • Persistence
  • Digit product
  • Frequency

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