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Number

530

530 is a composite number, even, a calendar year.

Deficient Number Descending Digits Odious Number Pernicious Number Recamán's Sequence Sphenic Number Squarefree Year

Historical context — 530 AD

Calendar year

Year 530 (DXXX) was a common year starting on Tuesday of the Julian calendar.

Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 · English fallback Read the full article on Wikipedia →

Historical context — 530 BC

Calendar year

The year 530 BC was a year of the pre-Julian Roman calendar.

Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 · English fallback Read the full article on Wikipedia →

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, 530
Ended on: Sunday
December 31, 530
Friday the 13ths: 2
2 Friday the 13ths this year.
Decade: 530s
530–539
Century: 6th century
501–600
Millennium: 1st millennium
1–1000
Years ago: 1,496
1496 years before 2026.

In other calendars

Hebrew: 4290 / 4291 AM
Rosh Hashanah falls in September/October.
Chinese: Year of the zodiac:Metal zodiac:Dog
Sexagenary cycle position 47 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 1073 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Ethiopian: 522 / 523 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 452 / 451 Saka
Indian national calendar; year starts in March.

Properties

Parity: Even
Digit count: 3
Digit sum: 8
Digit product: 0
Digital root: 8
Palindrome: No
Bit width: 10 bits
Reversed: 35
Recamán's sequence: a(1,199) = 530
Square (n²): 280,900
Cube (n³): 148,877,000
Divisor count: 8
σ(n) — sum of divisors: 972
φ(n) — Euler's totient: 208
Sum of prime factors: 60

Primality

Prime factorization: 2 × 5 × 53

Nearest primes: 523 (−7) · 541 (+11)

Divisors & multiples

All divisors (8)

1 · 2 · 5 · 10 · 53 · 106 · 265 (half) · 530

Aliquot sum (sum of proper divisors): 442

Factor pairs (a × b = 530)

1 × 530

2 × 265

5 × 106

10 × 53

First multiples

530 · 1,060 (double) · 1,590 · 2,120 · 2,650 · 3,180 · 3,710 · 4,240 · 4,770 · 5,300

Sums & aliquot sequence

As a sum of two squares: 1² + 23² = 13² + 19²

As consecutive integers: 131 + 132 + 133 + 134 104 + 105 + 106 + 107 + 108 17 + 18 + … + 36

Aliquot sequence: 530 → 442 → 314 → 160 → 218 → 112 → 136 → 134 → 70 → 74 → 40 → 50 → 43 → 1 → 0 — terminates at zero

Representations

In words: five hundred thirty
Ordinal: 530th
Roman numeral: DXXX
Binary: 1000010010
Octal: 1022
Hexadecimal: 0x212
Base64: AhI=
One's complement: 65,005 (16-bit)

In other bases

ternary (3) 201122

quaternary (4) 20102

quinary (5) 4110

senary (6) 2242

septenary (7) 1355

nonary (9) 648

undecimal (11) 442

duodecimal (12) 382

tridecimal (13) 31a

tetradecimal (14) 29c

pentadecimal (15) 255

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋
Egyptian hieroglyphic: 𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆
Greek (Milesian): φλʹ
Mayan (base 20): 𝋡·𝋦·𝋪
Chinese: 五百三十
Chinese (financial): 伍佰參拾

In other modern scripts

Eastern Arabic ٥٣٠ Devanagari ५३० Bengali ৫৩০ Tamil ௫௩௦ Thai ๕๓๐ Tibetan ༥༣༠ Khmer ៥៣០ Lao ໕໓໐ Burmese ၅၃၀

Digit at this position in famous constants

π — Pi (π): Digit 530 = 9
e — Euler's number (e): Digit 530 = 2
φ — Golden ratio (φ): Digit 530 = 8
√2 — Pythagoras's (√2): Digit 530 = 4
ln 2 — Natural log of 2: Digit 530 = 4
γ — Euler-Mascheroni (γ): Digit 530 = 5

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 530, here are decompositions:

7 + 523 = 530
31 + 499 = 530
43 + 487 = 530
67 + 463 = 530
73 + 457 = 530
97 + 433 = 530
109 + 421 = 530
151 + 379 = 530

Showing the first eight; more decompositions exist.

Unicode codepoint

Ȓ

Latin Capital Letter R With Inverted Breve

U+0212

Uppercase letter (Lu)

UTF-8 encoding: C8 92 (2 bytes).

Lookup U+0212 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#000212

RGB(0, 2, 18)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.2.18.

Address: 0.0.2.18
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.2.18

Unspecified address (0.0.0.0/8) — "this network" placeholder.

NANP area code 530

The number 530 is an active NANP area code (North American Numbering Plan).

Primary area: Northeastern California
Region: California
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.

Look up area code 530 ↗