Armenian Capital Letter Ra
HTML Entity Browser Test:

U+054C is the Unicode hex value of the character Armenian Capital Letter Ra, which is categorized as "uppercase letter" in the Unicode 6.0 character table.

Unicode Character Information
Unicode Hex U+054C
General Category Uppercase Letter [Code: Lu]
Canonical Combining Class 0
Bidirectional Category L
Mirrored N
Lowercase Version U+057C
Unicode Character Encodings
Armenian Capital Letter Ra HTML Entity Ռ (decimal entity), Ռ (hex entity)
Windows Key Code Alt 1356 or Alt +054C1
Programming Source Code Encodings Python hex: u"\u054C", Hex for C++ and Java: "\u054C"
UTF-8 Hexadecimal Encoding 0xD58C
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 1356) will only work on computers with support for this Unicode character in the active code page. The hexadecimal alt code (Alt +054C) will work for all Unicode characters provided Hex input from the numeric keypad is enabled.
* If the Armenian Capital Letter Ra character does not display correctly in your browser, you may not have a Unicode font on your system that supports this particular symbol.