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231 (number)
231
is the
natural number
following
230
and preceding
232
.
In mathematics
Two hundred
thirty-one
231 = 3·7·11,
sphenic number
,
triangular number
,
hexagonal number
,
octahedral number
,
centered octahedral number
, the number of
integer partitions
of
16
,
Mertens function
returns
0, and is the number of
cubic inches
in a U.S. liquid
gallon
.
In other
fields
231 is:
The year A.D. 231 or
231 BC
.
+231 is the
country code
for
Liberia
.
Pacific
231
, an
orchestral work
by
French
composer
Arthur Honegger
.
Pacific 231
, a 1949
short film
directed
by
Jean Mitry
.
List of highways numbered 231
