228817 has 4 divisors (see below), whose sum is σ = 240880. Its totient is φ = 216756.

The previous prime is 228799. The next prime is 228829. The reversal of 228817 is 718822.

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.

It is a cyclic number.

It is not a de Polignac number, because 228817 - 2¹¹ = 226769 is a prime.

It is a Duffinian number.

228817 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (228847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6003 + ... + 6040.

It is an arithmetic number, because the mean of its divisors is an integer number (60220).

2²²⁸⁸¹⁷ is an apocalyptic number.

It is an amenable number.

228817 is a deficient number, since it is larger than the sum of its proper divisors (12063).

228817 is a wasteful number, since it uses less digits than its factorization.

228817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12062.

The product of its digits is 1792, while the sum is 28.

The square root of 228817 is about 478.3481995367. The cubic root of 228817 is about 61.1640304391.

The spelling of 228817 in words is "two hundred twenty-eight thousand, eight hundred seventeen".