521 in words: five hundred twenty-one

521
In words

Five hundred twenty-one

How 521 is built

Pattern: Hundreds with a hyphenated ending

521 combines “five hundred” with the hyphenated ending “twenty-one”.

521 500 20 1

Digit and place-value table

Digit Position Value Value in words
5 hundreds 500 five hundred
2 tens 20 twenty
1 ones 1 one

Reading the number in groups

Group Digits Reading
units group 521 five hundred twenty-one

Why 521 is written this way

Hundreds with a hyphenated ending

521 combines “five hundred” with the hyphenated ending “twenty-one”.

Hyphenation

The spelling contains one hyphen. Each hyphen joins a tens word to a non-zero ones word inside the same two-digit group.

American English and “and”

The American English style used here normally omits “and” between “hundred” and the following tens or ones.

Number structure

  • 521 has 3 digits and 1 place-value group.
  • Every digit position contributes a spoken value.
  • Its hundreds component is “five hundred”; its final two-digit group is 21.