228166 has 4 divisors (see below), whose sum is σ = 342252. Its totient is φ = 114082.

The previous prime is 228139. The next prime is 228181. The reversal of 228166 is 661822.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 228166.

It is a congruent number.

It is an unprimeable number.

228166 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 as a sum of consecutive naturals, namely, 57040 + ... + 57043.

It is an arithmetic number, because the mean of its divisors is an integer number (85563).

2²²⁸¹⁶⁶ is an apocalyptic number.

228166 is a deficient number, since it is larger than the sum of its proper divisors (114086).

228166 is a wasteful number, since it uses less digits than its factorization.

228166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114085.

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

The square root of 228166 is about 477.6672481969. The cubic root of 228166 is about 61.1059700603.

Adding to 228166 its reverse (661822), we get a palindrome (889988).

It can be divided in two parts, 22816 and 6, that added together give a palindrome (22822).

The spelling of 228166 in words is "two hundred twenty-eight thousand, one hundred sixty-six".