Names of 2
| Nominal | 2 |
| Cardinal | two |
| Ordinal | 2nd |
| This number as US currency | two dollars |
| Is 2 an odd number? | 2 is NOT an odd number |
| Is 2 an even number? | 2 is an even number |
| Is 2 a palindrome? | 2 is a palindrome number |
| Is 2 a triangle number? | 2 is NOT a triangle number |
| Factorial (n!) of number 2! | 2 |
2 in other Bases
| Base 2 (Binary) | 102 |
| Base 3 (Ternary) | 23 |
| Base 4 (Quaternary) | 24 |
| Base 5 (Quinary) | 25 |
| Base 6 (Senary) | 26 |
| Base 8 (Octal) | 28 |
| Base 12 (Duodecimal) | 212 |
| Base 16 (Hexadecimal) | 216 |
| Base 20 (Vigesimal) | 220 |
Primes and Factors tests for 2
| Is 2 a Prime Number? | 2 is a prime |
| Is 2 a perfect number? | 2 is NOT a perfect number |
| Is 2 a Mersenne Prime? | 2 is NOT a Mersenne prime |
| Is 2 a Fermat Prime? | 2 is NOT a Fermat prime |
| Is 2 a Fibonacci Prime? | 2 is a Fibonacci prime |
| Is 2 a Partition Prime? | 2 is a Partition prime |
| Is 2 a Pell Prime? | 2 is a Pell prime |
| Prime Factors | Prime factors of 2 |
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2 in other Numerals
| 2 in Roman Numeral | II |
| 2 in Chinese Numeral | 貳 |
| 2 in Egyptian Numeral | 𓏻 |
| 2 in Babylonian Numeral |  |
Roots and stuff for 2
| Is 2 a square number? | 2 is NOT a square number |
| Is 2 a cube number? | 2 is NOT a cube number |
| Square root of the number 2 | 1.4142135623731 |
| Cube root of the number 2 | 1.2599210498949 |
Recreational math for 2
| Number 2 reversed | 2 |
| Sum of the digits | 2 |
| No of digits | 1 |