615
615 is a composite number, odd, a calendar year.
Historical context — 615 AD
Calendar year
Year 615 (DCXV) was a common year starting on Wednesday of the Julian calendar.
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Historical context — 615 BC
Calendar year
The year 615 BC was a year of the pre-Julian Roman calendar.
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Year facts
- Year type
-
Common year
Standard 365-day year; not divisible by 4 (or divisible by 100 but not 400).
- Days in year
- 365
- ISO weeks
- 52
- Started on
-
Sunday
January 1, 615
- Ended on
-
Sunday
December 31, 615
- Friday the 13ths
-
2
2 Friday the 13ths this year.
- Decade
-
610s
610–619
- Century
-
7th century
601–700
- Millennium
-
1st millennium
1–1000
- Years ago
-
1,411
1411 years before 2026.
In other calendars
- Hebrew
-
4375 / 4376 AM
Rosh Hashanah falls in September/October.
- Chinese
-
Year of the zodiac:Wood zodiac:Pig
Sexagenary cycle position 12 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
1158 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Ethiopian
-
607 / 608 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
537 / 536 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 3 × 5 × 41
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- six hundred fifteen
- Ordinal
- 615th
- Roman numeral
- DCXV
- Binary
- 1001100111
- Octal
- 1147
- Hexadecimal
- 0x267
- Base64
- Amc=
- One's complement
- 64,920 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋 𒌋𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- χιεʹ
- Mayan (base 20)
- 𝋡·𝋪·𝋯
- Chinese
- 六百一十五
- Chinese (financial)
- 陸佰壹拾伍
Digit at this position in famous constants
- π — Pi (π)
- Digit 615 = 6
- e — Euler's number (e)
- Digit 615 = 1
- φ — Golden ratio (φ)
- Digit 615 = 3
- √2 — Pythagoras's (√2)
- Digit 615 = 2
- ln 2 — Natural log of 2
- Digit 615 = 6
- γ — Euler-Mascheroni (γ)
- Digit 615 = 9
Also seen as
UTF-8 encoding: C9 A7 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.2.103.
- Address
- 0.0.2.103
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.2.103
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The number 615 is an active NANP area code (North American Numbering Plan).
- Primary area
- Nashville
- Region
- Tennessee
- Country
- United States
Most NANP area codes have multiple overlays in dense regions; the primary area listed is the historic/largest population center for this code.
This passes the ABA routing number checksum and matches the Federal Reserve numbering scheme.
Banks operate many routing numbers per state and division; an unmatched checksum-valid number can still be a real RTN at a smaller institution.