Number

2,100

2,100 is a composite number, even, a calendar year.

Abundant Number Harshad / Niven Year

Properties

Parity: Even
Digit count: 4
Digit sum: 3
Digital root: 3
Palindrome: No
Divisor count: 36
σ(n) — sum of divisors: 6,944

Primality

Prime factorization: 2 ² × 3 × 5 ² × 7

Divisors & multiples

All divisors (36)

1 · 2 · 3 · 4 · 5 · 6 · 7 · 10 · 12 · 14 · 15 · 20 · 21 · 25 · 28 · 30 · 35 · 42 · 50 · 60 · 70 · 75 · 84 · 100 · 105 · 140 · 150 · 175 · 210 · 300 · 350 · 420 · 525 · 700 · 1050 · 2100

Aliquot sum (sum of proper divisors): 4,844

Factor pairs (a × b = 2,100)

1 × 2100

2 × 1050

3 × 700

4 × 525

5 × 420

6 × 350

7 × 300

10 × 210

12 × 175

14 × 150

15 × 140

20 × 105

21 × 100

25 × 84

28 × 75

30 × 70

35 × 60

42 × 50

First multiples

2,100 · 4,200 · 6,300 · 8,400 · 10,500 · 12,600 · 14,700 · 16,800 · 18,900 · 21,000

Representations

In words: two thousand one hundred
Ordinal: 2100th
Roman numeral: MMC
Binary: 100000110100
Octal: 4064
Hexadecimal: 834

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 2100, here are decompositions:

11 + 2089 = 2100
13 + 2087 = 2100
17 + 2083 = 2100
19 + 2081 = 2100
31 + 2069 = 2100
37 + 2063 = 2100
47 + 2053 = 2100
61 + 2039 = 2100

Showing the first eight; more decompositions exist.

Unicode codepoint

࠴

U+0834

Other punctuation (Po)

UTF-8 encoding: E0 A0 B4 (3 bytes).

Lookup U+0834 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#000834

RGB(0, 8, 52)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.8.52.