45 in words
British English
forty-five
Quick reference
- In figures
- 45
- British English
- forty-five
- American English
- The same (why they differ)
- Ordinal
- forty-fifth (45th)
- Roman numeral
- XLV
- Place value
- 4 in the tens column; 5 in the ones column
- Expanded form
- 40 + 5
- Standard form
- 4.5 × 10¹
- Even or odd
- Odd
- Prime factors
- 3² × 5
Convert any other number, up to thirty-six digits.