Names of 21825
| Nominal | 21825 |
| Cardinal | twenty-one thousand eight hundred twenty-five |
| Ordinal | 21,825th |
| This number as US currency | twenty-one thousand eight hundred twenty-five dollars |
| Is 21825 an odd number? | 21825 is an odd number |
| Is 21825 an even number? | 21825 is NOT an even number |
| Is 21825 a palindrome? | 21825 is NOT a palindrome number |
| Is 21825 a triangle number? | 21825 is NOT a triangle number |
21825 in other Bases
| Base 2 (Binary) | 1010101010000012 |
| Base 3 (Ternary) | 10022211003 |
| Base 4 (Quaternary) | 111110014 |
| Base 5 (Quinary) | 11443005 |
| Base 6 (Senary) | 2450136 |
| Base 8 (Octal) | 525018 |
| Base 12 (Duodecimal) | 1076912 |
| Base 16 (Hexadecimal) | 554116 |
| Base 20 (Vigesimal) | 2EB520 |
Primes and Factors tests for 21825
| Is 21825 a Prime Number? | 21825 is NOT a prime |
| Is 21825 a perfect number? | 21825 is NOT a perfect number |
| Is 21825 a Mersenne Prime? | 21825 is NOT a Mersenne prime |
| Is 21825 a Fermat Prime? | 21825 is NOT a Fermat prime |
| Is 21825 a Fibonacci Prime? | 21825 is NOT a Fibonacci prime |
| Is 21825 a Partition Prime? | 21825 is NOT a Partition prime |
| Is 21825 a Pell Prime? | 21825 is NOT a Pell prime |
| Prime Factors | Prime factors of 21825 |
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21825 in other Numerals
| 21825 in Roman Numeral | XXMDCCCXXV |
| 21825 in Chinese Numeral | 貳萬壹仟捌佰貳拾伍 |
| 21825 in Egyptian Numeral | 𓂮𓆼𓍩𓎇𓏾 |
| 21825 in Babylonian Numeral |    |
Roots and stuff for 21825
| Is 21825 a square number? | 21825 is NOT a square number |
| Is 21825 a cube number? | 21825 is NOT a cube number |
| Square root of the number 21825 | 147.73286702694 |
| Cube root of the number 21825 | 27.945898935645 |
Recreational math for 21825
| Number 21825 reversed | 52812 |
| Sum of the digits | 18 |
| No of digits | 5 |