5322
RFC 5322 defines the format of an email message.
- Even
- Composite
Where 5322 fits
Why 5322 is special
The address grammar it specifies is notoriously permissive — quoted strings, comments and nested constructs are all legal. Validating an email address with a regular expression is a standing joke among developers because of it.
Factors & digit properties
- Divisors (8)
- 1, 2, 3, 6, 887, 1774, 2661, 5322
- Prime factorisation
- 2 × 3 × 887
- Digit sum
- 12
- Digital root
- 3
Representations
- Decimal
- 5322
- Binary
- 1010011001010
- Octal
- 12312
- Hexadecimal
- 14ca
- Scientific notation
- 5.322 × 10^3
Other mathematical patterns
- Abundant number
Related numbers & connections
RFC 5322 defines what an email message looks like and port 587 is where a person's mail client hands one to its own server.
View 587 →Other connections
- is associated with587
why?
Strength 0.50, confidence "high".
Technology & computing
RFC 5322 is the present specification of email message syntax, obsoleting RFC 2822. The header structure it inherits from RFC 822 has now survived more than forty years.
DocumentedTechnology & computingGeography: International — IETFPeriod: 2008The email address grammar permits quoted local parts, embedded comments and nesting. A regular expression matching it fully runs to thousands of characters, which is why the usual advice is to send a confirmation instead.
DocumentedTechnology & computing
Common questions
Is 5322 a prime number?
No, 5322 is not prime.
What are the factors of 5322?
The factors of 5322 are 1, 2, 3, 6, 887, 1774, 2661, 5322.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 2 reviewer-confirmed records, sourced and reviewed before publication.
Last reviewed: 3 August 2026