2,013
2,013 is a composite number, odd, a calendar year.
Notable events — 2013 AD
- Feb 15 A meteor explodes over Chelyabinsk, Russia, injuring nearly 1,500.
- Feb 28 Pope Benedict XVI resigns, the first papal resignation in nearly 600 years.
- Mar 13 Cardinal Jorge Mario Bergoglio is elected Pope Francis, the first Jesuit and first pope from the Americas.
- Apr 15 Two bombs explode at the Boston Marathon, killing three and injuring hundreds.
- Jun 6 Edward Snowden leaks classified details of NSA mass-surveillance programs.
Events compiled from Wikipedia ↗ · Licensed CC BY-SA 4.0
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
-
Tuesday
January 1, 2013
- Ended on
-
Tuesday
December 31, 2013
- Friday the 13ths
-
2
2 Friday the 13ths this year.
- Easter Sunday
-
March 31
Sunday, March 31, 2013
- Decade
-
2010s
2010–2019
- Century
-
21st century
2001–2100
- Millennium
-
3rd millennium
2001–3000
- Years ago
-
13
13 years before 2026.
In other calendars
- Hebrew
-
5773 / 5774 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
1434 / 1435 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Water zodiac:Snake
Sexagenary cycle position 30 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
2556 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
1391 / 1392 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
2005 / 2006 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1935 / 1934 Saka
Indian national calendar; year starts in March.
- Japanese
-
Heisei 25
Reign-era counting from the start of each emperor's reign.
Properties
- Parity
- Odd
- Digit count
- 4
- Digit sum
- 6
- Digit product
- 0
- Digital root
- 6
- Palindrome
- No
- Bit width
- 11 bits
- Reversed
- 3,102
- Recamán's sequence
- a(3,725) = 2,013
- Square (n²)
- 4,052,169
- Cube (n³)
- 8,157,016,197
- Divisor count
- 8
- σ(n) — sum of divisors
- 2,976
- φ(n) — Euler's totient
- 1,200
- Sum of prime factors
- 75
Primality
Prime factorization: 3 × 11 × 61
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- two thousand thirteen
- Ordinal
- 2013th
- Roman numeral
- MMXIII
- Binary
- 11111011101
- Octal
- 3735
- Hexadecimal
- 0x7DD
- Base64
- B90=
- One's complement
- 63,522 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓆼𓎆𓏺𓏺𓏺
- Greek (Milesian)
- ͵βιγʹ
- Mayan (base 20)
- 𝋥·𝋠·𝋭
- Chinese
- 二千零一十三
- Chinese (financial)
- 貳仟零壹拾參
Digit at this position in famous constants
- π — Pi (π)
- Digit 2,013 = 5
- e — Euler's number (e)
- Digit 2,013 = 4
- φ — Golden ratio (φ)
- Digit 2,013 = 1
- √2 — Pythagoras's (√2)
- Digit 2,013 = 5
- ln 2 — Natural log of 2
- Digit 2,013 = 8
- γ — Euler-Mascheroni (γ)
- Digit 2,013 = 0
Also seen as
UTF-8 encoding: DF 9D (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.7.221.
- Address
- 0.0.7.221
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.7.221
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 2013 first appears in π at position 6,276 of the decimal expansion (the 6,276ordinal-suffix:th digit after the integer 3).
Search range: the first 1,000,000 fractional digits of π. Any 6-digit-or-shorter string is virtually guaranteed to appear in there — the more interesting signal is the position.