224 (number)

224 (two hundred [and] twenty-four) is the natural number following 223 and preceding 225.

← 223 224 225 →
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Cardinal	two hundred twenty-four
Ordinal	224th (two hundred twenty-fourth)
Factorization	2^5 × 7
Prime	No
Greek numeral	ΣΚΔ´
Roman numeral	CCXXIV
Binary	111000002
Ternary	220223
Octal	3408
Duodecimal	16812
Hexadecimal	E016

224 is a practical number,[1] and a sum of two positive cubes 2³ + 6³.[2]

224 is the smallest k with λ(k) = 24, where λ(k) is the Carmichael function.[3]

In other fields

• The years 224 and 224 BC
• Area code 224
• .224 Weatherby Magnum, firearm cartridge

References

1. Sloane, N. J. A. (ed.). "Sequence A005153 (Practical numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
2. Sloane, N. J. A. (ed.). "Sequence A003325 (Numbers that are the sum of 2 positive cubes)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
3. Sloane, N. J. A. (ed.). "Sequence A141162 (Smallest k such that lambda(k) = n)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.