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223 is a prime number
BaseRepresentation
bin11011111
322021
43133
51343
61011
7436
oct337
9267
10223
11193
12167
13142
1411d
15ed
hexdf

223 has 2 divisors, whose sum is σ = 224. Its totient is φ = 222.

The previous prime is 211. The next prime is 227. The reversal of 223 is 322.

223 is an esthetic number in base 15, because in such base it adjacent digits differ by 1.

It is a strong prime.

223 is a truncatable prime.

It is a cyclic number.

It is not a de Polignac number, because 223 - 25 = 191 is a prime.

It is a Carol number, being equal to (24 - 1)2 - 2.

223 is a lucky number.

It is a plaindrome in base 8, base 9, base 10, base 12, base 14 and base 16.

It is a nialpdrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111 + 112.

It is an arithmetic number, because the mean of its divisors is an integer number (112).

223 is a deficient number, since it is larger than the sum of its proper divisors (1).

223 is an equidigital number, since it uses as much as digits as its factorization.

223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12, while the sum is 7.

The square root of 223 is about 14.9331845231. The cubic root of 223 is about 6.0641269945.

The spelling of 223 in words is "two hundred twenty-three", and is thus an aban number and an iban number.