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# 2

Number 2 (two) is an even digit prime number and natural number following 1 and preceding 3.

## Properties of the number 2

 Nominal 2 Cardinal two Ordinal 2nd Number of digits 1 Sum of digits 2 Product of digits 2 Number parity Even
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## Prime Factorization of 2

 Prime factorization 2 Prime factors 2 Number of distinct prime factors ω(n) 1 Total number of prime factors Ω(n) 1 Sum of prime factors 2 Product of prime factors 2
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## Divisors of 2

 List of proper divisors 1 List of all dividers 1, 2 Number of divisors d(n) 2 Sum of all divisors σ(n) 3 Aliquot sum 1 2 is a deficient number , since it is larger than the sum of its proper divisors (1). Its deficiency is 1.
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## Prime numbers

 Is 2 a prime number? Yes Is 2 a semiprime number? No Is 2 a Chen prime number? Yes Is 2 a Mersenne prime number? Yes: M0
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## Sequences

 Is 2 a Catalan number? Yes: C2 Is 2 a Fibonacci number? Yes Is 2 a Idoneal number? Yes: I1
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## Number theory

Number theory is a branch of pure mathematics devoted primarily to the study of the integers and integer-valued functions.
 2 is not a Happy number 2 is a Humble number 2 is not a Münchhausen number 2 is not a Perfect number 2 is not a Perfect square 2 is a Palindrome
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## Numeric Bases of 2

In mathematics, a base or radix of a numeral system is the number of unique digits, including zero, used to represent numbers in that system.
BaseSystemValue
2Binary102
3Ternary23
4Quaternary24
5Quinary25
6Senary26
7Septenary27
8Octal28
9Nonary29
10Decimal2
12Duodecimal212
20Vigesimal220
36Base36236
60Sexagesimal260
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## Mathematical operations

Mathematical operations are actions that are performed on numbers or mathematical expressions to find a numerical result.
 Square of 2 (n2) 4 Cube of 2 (n3) 8 Square root of 2 1.41421 Natural Logarithm (ln) of 2 0.693147 Decimal Logarithm (log) of 2 0.30103
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## Trigonometry

Trigonometry is the study of the relationship between the angles and sides of a triangle.
 Sine of 2 0.909297 Cosecant of 2 1.09975 Cosine of 2 -0.416147 Secant of 2 -2.403 Tangent of 2 -2.18504 Cotangent of 2 -0.457658
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## Number parity

Parity is the property of an integer of whether it is even or odd.

### Is 2 an Even Number?

Yes, the number 2 is an even number.

### Is 2 an Odd Number?

No
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## Ban number

In recreational mathematics, a ban number is a number that does not contain a particular letter when spelled out in English; in other words, the letter is "banned".
 The spelling of 2 in words is "two", meaning that: 2 is an aban number (a number without the letter a) 2 is an eban number (a number without the letter e) 2 is an iban number (a number without the letter i) 2 is not an oban number (as it contains the letter o) 2 is not a tban number (as it contains the letter t) 2 is an uban number (a number without the letter u)
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## Numeral systems

How to write 2 in other number systems?
 Bengali numerals ২ Eastern Arabic numerals ٢ Hieroglyphs numeralsused in Ancient Egypt 𓏻 Khmer numerals ២ Japanese numerals 二 Roman numerals II Thai numerals ๒
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## Translation

How do you say 2 in 38 different languages?
 Arabic إثنان Croatian dva Czech dva Danish to Dutch twee Estonian eve Faroese tveir Filipino dalawá Finnish kaksi French deux Greek δύο German zwei Hebrew שתיים Hindi दो Hungarian kettő Icelandic tveir Indonesian dua Italian due Japanese 二 Korean 이 Latvian divi Lithuanian du Norwegian to Persian دو Polish dwa Portuguese dois Romanian doi Russian два Serbian два Slovak dva Slovene dva Spanish dos Swahili mbili Swedish två Thai สอง Turkish iki Ukrainian два Vietnamese hai
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## Miscellaneous

 Number 2 reversed 2 ASCII Code 2  Unicode Character U+0002  Unix Timestamp Thu, 01 Jan 1970 00:00:02 +0000
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