229 has 2 divisors, whose sum is σ = 230. Its totient is φ = 228.

The previous prime is 227. The next prime is 233. The reversal of 229 is 922.

229 is nontrivially palindromic in base 12.

229 is an esthetic number in base 8, because in such base its adjacent digits differ by 1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 225 + 4 = 15^2 + 2^2 .

It is a cyclic number.

It is not a de Polignac number, because 229 - 2¹ = 227 is a prime.

Together with 227, it forms a pair of twin primes.

It is a magnanimous number.

229 is an undulating number in base 12.

It is a plaindrome in base 7, base 8, base 10, base 11, base 13 and base 14.

It is a nialpdrome in base 3, base 4 and base 16.

It is a zygodrome in base 3.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114 + 115.

It is an arithmetic number, because the mean of its divisors is an integer number (115).

It is an amenable number.

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

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

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

The product of its digits is 36, while the sum is 13.

The square root of 229 is about 15.1327459504. The cubic root of 229 is about 6.1180331726.

Adding to 229 its sum of digits (13), we get a palindrome (242).

Subtracting from 229 its sum of digits (13), we obtain a cube (216 = 6³).

The spelling of 229 in words is "two hundred twenty-nine", and thus it is an aban number.