221988
Everything about the number 221988 — its names, how to write it in other bases and numeral systems, and what makes it interesting mathematically.
Names of 221988
| Nominal | 221988 |
| Cardinal | two hundred twenty-one thousand nine hundred eighty-eight |
| Ordinal | 221,988th |
| This number as US currency | two hundred twenty-one thousand nine hundred eighty-eight dollars |
Properties (and some facts) of 221988
| Is 221988 an odd number? | 221988 is not an odd number |
| Is 221988 an even number? | 221988 is an even number |
| Is 221988 a palindrome? | 221988 is not a palindrome |
| Is 221988 a triangle number? | 221988 is not a triangle number |
221988 in other bases
| Base 2 (Binary) | 110110001100100100 |
| Base 3 (Ternary) | 102021111210 |
| Base 4 (Quaternary) | 312030210 |
| Base 5 (Quinary) | 24100423 |
| Base 6 (Senary) | 4431420 |
| Base 8 (Octal) | 661444 |
| Base 12 (Duodecimal) | A8570 |
| Base 16 (Hexadecimal) | 36324 |
| Base 20 (Vigesimal) | 17EJ8 |
Primes and factors tests for 221988
| Is 221988 a prime number? | 221988 is not a prime number |
| Is 221988 a perfect number? | 221988 is not a perfect number |
| Is 221988 a Mersenne prime? | 221988 is not a Mersenne prime |
| Is 221988 a Fermat prime? | 221988 is not a Fermat prime |
| Is 221988 a Fibonacci prime? | 221988 is not a Fibonacci prime |
| Is 221988 a partition prime? | 221988 is not a partition prime |
| Is 221988 a Pell prime? | 221988 is not a Pell prime |
| Prime Factors | Prime factors of 221988 |
221988 in other numeral systems
| 221988 in Roman numerals | CCXXMCMLXXXVIII |
| 221988 in Chinese numerals | 貳拾萬貳萬壹仟玖佰捌拾捌 |
| 221988 in Babylonian numerals |    |
| 221988 in Egyptian numerals | 𓆐𓆐𓂮𓆼𓍪𓎍𓐁 |
Roots and squares for 221988
| Is 221988 a square number? | 221988 is not a square number |
| Is 221988 a cube number? | 221988 is not a cube number |
| Square root of 221988 | 471.1560251127 |
| Cube root of 221988 | 60.549398445643 |
Recreational math for 221988
| Number 221988 reversed | 889122 |
| Sum of the digits | 30 |
| Number of digits | 6 |