This character is a Other Letter and is mainly used in the Egyptian Hieroglyphs script.
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it is written from left to right. When changing direction it is not mirrored. The word that U+131F3 forms with similar adjacent characters prevents a line break inside it.
The Unikemet database provides additional information about this hieroglyph. It is described there as βThe sun, within a halo.β.
The Wikipedia has the following information about this codepoint:
The ancient Egyptian Sun hieroglyph is Gardiner sign listed no. N5 for the sun-disc; it is also one of the hieroglyphs that refers to the god Ra.
In the 24th century BC Palermo Stone, the sun hieroglyph is used on the Palermo Piece-(obverse) of the 7-piece Palermo Stone to identify dates, or specific "day-events", ..."day of ...." A few of the King Year-Register's are dates only for example in Row V (of VI rows):
Representations
System
Representation (click value to copy)
NΒΊ
78323
UTF-8
F0 93 87 B3
UTF-16
D8 0C DD F3
UTF-32
00 01 31 F3
URL-Quoted
%F0%93%87%B3
HTML hex reference
𓇳
Wrong windows-1252 Mojibake
Γ°ββ‘Β³
Encoding: GB18030 (hex bytes)
91 30 93 37
RFC 5137
\u'131F3'
Bash and Zsh inside echo -e
\U000131F3
C and C++
\U000131F3
C#
\U000131F3
CSS
\0131F3
Excel
=UNICHAR(78323)
Go
\U000131F3
JavaScript
\uD80C\uDDF3
Modern JavaScript since ES6
\u{131f3}
JSON
\uD80C\uDDF3
Java
\uD80C\uDDF3
Lua
\u{131F3}
Matlab
char(78323)
Perl
"\x{131F3}"
PHP
\u{131f3}
PostgreSQL
U&'\+0131F3'
PowerShell
`u{131F3}
Python
\U000131F3
Ruby
\u{131f3}
Rust
\u{131f3}
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