Digit Three
HTML Entity Browser Test:

U+0033 is the Unicode hex value of the character Digit Three, which is categorized as "decimal digit number" in the Unicode 6.0 character table.

Unicode Character Information
Unicode Hex U+0033
Character Name DIGIT THREE
General Category Decimal Digit Number [Code: Nd]
Canonical Combining Class 0
Bidirectional Category EN
Numeric Value 3
Mirrored N
Unicode Character Encodings
Digit Three HTML Entity 3 (decimal entity), 3 (hex entity)
Windows Key Code Alt 0051 or Alt +00331
Programming Source Code Encodings Python hex: u"\u0033", Hex for C++ and Java: "\u0033"
UTF-8 Hexadecimal Encoding 0x33
1 To type a Unicode symbol in Windows, hold down the ALT key and enter the decimal or hexadecimal code provided using the numeric keypad. The decimal alt code (Alt 0051) will only work on computers with support for this Unicode character in the active code page. The hexadecimal alt code (Alt +0033) will work for all Unicode characters provided Hex input from the numeric keypad is enabled.
* If the Digit Three character does not display correctly in your browser, you may not have a Unicode font on your system that supports this particular symbol.