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# 244 (number)

## From Wikipedia, the free encyclopedia

244 (two hundred [and] forty-four) is the natural number following 243 and preceding 245.

 ← 243 244 245 →
Cardinaltwo hundred forty-four
Ordinal244th
(two hundred forty-fourth)
Factorization22× 61
Primeno
Greek numeralΣΜΔ´
Roman numeralCCXLIV
Binary111101002
Ternary1000013
Quaternary33104
Quinary14345
Senary10446
Octal3648
Duodecimal18412
HexadecimalF416
VigesimalC420
Base 366S36

## In mathematics

244 is:

• the sum of two nonzero fifth powers (244 = 1 + 243 = 15 + 35).[1]
• palindromic in bases 3 (1000013), 11 (20211), 60 (4460), 121 (22121), 243 (11243).
• a Harshad number in bases 3, 9, 11, 61, 62, 81, 121, 122, 123, 184, 241 and 243.
• the second anti-perfect number, meaning that reversing the digits of the proper divisors of 244 and adding the results gives 244 back again.[2]
• part of the sequence 1, 2, 4, 8, 61, 221, 244, ... in which each number is formed by reversing the digits of the double of the previous number.[3]

## References

1. ^ Sloane, N. J. A. (ed.). "Sequence A020896 (Positive numbers n such that n = x^5 + y^5 has a solution in nonzero integers x, y)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
2. ^
3. ^ Sloane, N. J. A. (ed.). "Sequence A036447 (Double and reverse digits)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
This page was last edited on 17 November 2018, at 06:50
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