As character names:

U+216E ROMAN NUMERAL FIVE HUNDRED character (Ⅾ)

As raw characters:

Ⅾ

As a string of HTML entities:

Ⅾ

Decoder output:

Byte number 1 is decimal 226, hex 0xE2, octal \342, binary 11100010
This is the first byte of a 3 byte sequence.

Byte number 2 is decimal 133, hex 0x85, octal \205, binary 10000101
This is continuation byte 1, expecting 1 more.

Byte number 3 is decimal 174, hex 0xAE, octal \256, binary 10101110
This is continuation byte 2, expecting 0 more.

U+216E	ROMAN NUMERAL FIVE HUNDRED
	# 0044 latin capital letter d