7331
NGC 7331 was once called the Milky Way's twin.
- Odd
- Prime
Where 7331 fits
Why 7331 is special
The comparison held until the Milky Way's own bar was confirmed, at which point our galaxy turned out to be a different type from its supposed likeness.
7331 is part of
Factors & digit properties
- Divisors (2)
- 1, 7331
- Prime factorisation
- 7331
- Digit sum
- 14
- Digital root
- 5
Representations
- Decimal
- 7331
- Binary
- 1110010100011
- Octal
- 16243
- Hexadecimal
- 1ca3
- Scientific notation
- 7.331 × 10^3
Other mathematical patterns
- Deficient number
- Happy number
- Twin prime
Related numbers & connections
Both have been called twins of the Milky Way, and both comparisons weakened once our own galaxy's bar was confirmed.
View 6744 →Other connections
- contrasts with6744
why?
Strength 0.50, confidence "high".
Science
NGC 7331 is a spiral galaxy long compared to the Milky Way. Confirmation of the Milky Way's central bar reduced the strength of the comparison.
DocumentedSciencePeriod: 1784–
Common questions
Is 7331 a prime number?
Yes, 7331 is prime — it has exactly two positive divisors: 1 and itself.
What are the factors of 7331?
The factors of 7331 are 1, 7331.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 1 reviewer-confirmed record, sourced and reviewed before publication.
Last reviewed: 3 August 2026