156
156 is the ISO 3166-1 numeric country code for China.
- Even
- Composite
Where 156 fits
Why 156 is special
The numeric codes are assigned in alphabetical order of the English country name at the time of allocation, which is why they are not sequential by region or size.
Factors & digit properties
- Divisors (12)
- 1, 2, 3, 4, 6, 12, 13, 26, 39, 52, 78, 156
- Prime factorisation
- 2^2 × 3 × 13
- Digit sum
- 12
- Digital root
- 3
Representations
- Decimal
- 156
- Binary
- 10011100
- Octal
- 234
- Hexadecimal
- 9c
- Roman numeral
- CLVI
- Scientific notation
- 1.560 × 10^2
Other mathematical patterns
- Abundant number
- Harshad (Niven) number
Related numbers & connections
China's ISO numeric code and its calling code. The two were assigned by different bodies decades apart, which is why neither is derivable from the other.
View 86 →Other connections
- is associated with86
why?
Strength 0.50, confidence "high".
Geography
156 is China's ISO numeric code. The codes were assigned alphabetically by English name when allocated, so the ordering preserves a snapshot of names rather than any geographic logic.
DocumentedGeographyGeography: China
Common questions
Is 156 a prime number?
No, 156 is not prime.
What are the factors of 156?
The factors of 156 are 1, 2, 3, 4, 6, 12, 13, 26, 39, 52, 78, 156.
What is 156 in Roman numerals?
156 in Roman numerals is CLVI.
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