As character names:

U+0023 NUMBER SIGN character (#)

As raw characters:

#

As a string of HTML entities:

#

Decoder output:

Byte number 1 is decimal 35, hex 0x23, octal \043, binary 00100011

U+0023	NUMBER SIGN
	= pound sign (weight)
	= hashtag, hash
	= crosshatch, octothorpe
	* for denoting musical sharp 266F is preferred
	x (l b bar symbol - 2114)
	x (numero sign - 2116)
	x (viewdata square - 2317)
	x (music sharp sign - 266F)
	x (equals sign and slanted parallel - 29E3)