1555
1555 is the year of the Peace of Augsburg.
- Odd
- Composite
Where 1555 fits
Why 1555 is special
It let each German prince choose Lutheranism or Catholicism for his territory — cuius regio, eius religio. Subjects had no choice, and the omission of Calvinism from the settlement helped cause the Thirty Years' War.
Factors & digit properties
- Divisors (4)
- 1, 5, 311, 1555
- Prime factorisation
- 5 × 311
- Digit sum
- 16
- Digital root
- 7
Representations
- Decimal
- 1555
- Binary
- 11000010011
- Octal
- 3023
- Hexadecimal
- 613
- Roman numeral
- MDLV
- Scientific notation
- 1.555 × 10^3
Other mathematical patterns
- Deficient number
- Semiprime
Related numbers & connections
The Peace of Augsburg in 1555 settled religion between princes and excluded Calvinism, which is part of why the Thirty Years' War began in 1618.
View 1618 →Other connections
- developed from1618
why?
Strength 0.50, confidence "high".
Law & regulation
Augsburg settled religious conflict by letting each prince impose his confession on his territory. It was a peace between rulers rather than a grant of individual conscience, and its exclusion of Calvinism left the dispute to reopen in 1618.
DocumentedLaw & regulationGeography: Holy Roman EmpirePeriod: 1555
Common questions
Is 1555 a prime number?
No, 1555 is not prime.
What are the factors of 1555?
The factors of 1555 are 1, 5, 311, 1555.
What is 1555 in Roman numerals?
1555 in Roman numerals is MDLV.
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