200 (number)

Last updated
← 199 200 201 →
Cardinal two hundred
Ordinal 200th
(two hundredth)
Factorization 23 × 52
Divisors 1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200
Greek numeral Σ´
Roman numeral CC, cc
Binary 110010002
Ternary 211023
Senary 5326
Octal 3108
Duodecimal 14812
Hexadecimal C816
Armenian Մ
Hebrew ר
Babylonian cuneiform 𒐗⟪
Egyptian hieroglyph 𓍣

200 (two hundred) is the natural number following 199 and preceding 201.

In mathematics

200 is an abundant number, as 265, the sum of its proper divisors, is greater than itself.

The number appears in the Padovan sequence, preceded by 86, 114, 151 (it is the sum of the first two of these). [1]

The sum of Euler's totient function φ(x) over the first twenty-five integers is 200.

200 is the smallest base 10 unprimeable number – it cannot be turned into a prime number by changing just one of its digits to any other digit. It is also a Harshad number.

200 is an Achilles number. [2]

References

  1. ↑ "Sloane's A000931 : Padovan sequence". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-28.
  2. ↑ Sloane, N. J. A. (ed.). "SequenceA052486(Achilles numbers - powerful but imperfect: if n = Product(p_i^e_i) then all e_i > 1 (i.e., powerful), but the highest common factor of the e_i is 1, i.e., not a perfect power)". The On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
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