As character names:

U+212F SCRIPT SMALL E character (ℯ)

As raw characters:

ℯ

As a string of HTML entities:

ℯ

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 132, hex 0x84, octal \204, binary 10000100
This is continuation byte 1, expecting 1 more.

Byte number 3 is decimal 175, hex 0xAF, octal \257, binary 10101111
This is continuation byte 2, expecting 0 more.

U+212F	SCRIPT SMALL E
	= error
	= natural exponent
	# <font> 0065 latin small letter e