The number 225

Representation numerals

Greek numeral

σκεʹ

Arabic numeral

٢٢٥

Roman numeral

CCXXV

Maya numeral


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Chinese numeral

二百二十五

Hebrew numeral

רכה
Numeral systems
Binary: 11100001
Septimal (base 7): 441
Octal: 341
Hexadecimal: e1
Base 24: 99
Factorization
225 = 3 × 3 × 5 × 5
225 has 9 divisors: 1, 3, 5, 9, 15, 25, 45, 75, 225
Sum of all divisors other than 225: 178
225 = 15 2
225 = 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19 + 21 + ... + 29
Sums & differences
Sum of 2 squares: 225 = 122 + 92
Difference of 2 squares: 225 = 172 - 82 = 252 - 202 = 392 - 362 = 1132 - 1122
Characteristics
225 is a octogonal number
Related primes
The 225th prime number is: 1427
Previous prime number: 223 — Next prime number: 227
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