228229 has 4 divisors (see below), whose sum is σ = 238176. Its totient is φ = 218284.

The previous prime is 228223. The next prime is 228233. The reversal of 228229 is 922822.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 922822 = 2 ⋅461411.

It is a cyclic number.

It is not a de Polignac number, because 228229 - 2⁵ = 228197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4939 + ... + 4984.

It is an arithmetic number, because the mean of its divisors is an integer number (59544).

2²²⁸²²⁹ is an apocalyptic number.

It is an amenable number.

228229 is a deficient number, since it is larger than the sum of its proper divisors (9947).

228229 is an equidigital number, since it uses as much as digits as its factorization.

228229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9946.

The product of its digits is 1152, while the sum is 25.

The square root of 228229 is about 477.7331891339. The cubic root of 228229 is about 61.1115936295. Note that the first 3 decimals are identical.

The spelling of 228229 in words is "two hundred twenty-eight thousand, two hundred twenty-nine".