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1131

1131 is an integer with several notable numerical properties. It is odd and composite, with prime factorization 3 × 13 × 29. Its positive divisors are 1, 3, 13, 29, 39, 87, 377, and 1131.

In different numeral systems, 1131 appears as 10001101011 in binary and 0x46B in hexadecimal. In Roman numerals

As a calendar year, 1131 CE falls in the middle of the High Middle Ages. In Europe

In broader usage, 1131 may appear as a catalog or model number in various domains, but it

it
is
written
as
MCXXXI.
The
digits
sum
to
6,
and
the
number
is
not
a
Harshad
number
since
1131
divided
by
6
is
not
an
integer.
the
Julian
calendar
was
in
use
at
that
time,
with
historical
records
documenting
events
across
various
regions,
kingdoms,
and
orders.
The
year
is
of
interest
to
historians
and
scholars
who
study
medieval
chronology,
chronicles,
and
primary
sources
from
the
period.
does
not
have
a
single
universally
defined
meaning
beyond
its
mathematical
and
historical
references.
See
also
the
general
topics
of
number
theory
and
annals
of
the
12th
century
for
related
context.