4217

4217 is a natural number that lies between 4216 and 4218. It is an odd four-digit integer and is a prime number, meaning it has no positive divisors other than 1 and itself.

In organizational and standards contexts, the sequence 4217 is most widely encountered as part of the designation ISO 4217, the international standard for currency codes. ISO 4217, published by the International Organization for Standardization, defines three-letter alphabetic codes for currencies (for example USD for the United States dollar, EUR for the euro) and three-digit numeric codes, along with the minor unit used by each currency. The standard is widely used in banking, finance, and software to identify currencies in transactions and pricing.

Examples tied to ISO 4217 include USD, whose numeric code is 840 and which uses two decimal places as its minor unit, and JPY (Japanese yen), whose numeric code is 392 and which uses zero decimal places. In practice, most currencies employ two decimal places, while some currencies, such as the yen, do not use a minor unit for decimals.

Beyond mathematics and currency standards, 4217 can appear in various other contexts as a plain four-digit number, a model or part number, or as a placeholder in datasets. However, as a standalone term, it is primarily recognized for its role as a numeric value and its association with the ISO 4217 standard.