228185 has 8 divisors (see below), whose sum is σ = 279936. Its totient is φ = 178480.

The previous prime is 228181. The next prime is 228197. The reversal of 228185 is 581822.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 228185 - 2² = 228181 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251 + ... + 720.

It is an arithmetic number, because the mean of its divisors is an integer number (34992).

2²²⁸¹⁸⁵ is an apocalyptic number.

It is an amenable number.

228185 is a deficient number, since it is larger than the sum of its proper divisors (51751).

228185 is an equidigital number, since it uses as much as digits as its factorization.

228185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023.

The product of its digits is 1280, while the sum is 26.

The square root of 228185 is about 477.6871361048. The cubic root of 228185 is about 61.1076661664.

The spelling of 228185 in words is "two hundred twenty-eight thousand, one hundred eighty-five".