228205165 has 8 divisors (see below), whose sum is σ = 275430168. Its totient is φ = 181508160.

The previous prime is 228205129. The next prime is 228205183. The reversal of 228205165 is 561502822.

228205165 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 125507209 + 102697956 = 11203^2 + 10134^2 .

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

It is not a de Polignac number, because 228205165 - 2²³ = 219816557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131046 + ... + 132775.

It is an arithmetic number, because the mean of its divisors is an integer number (34428771).

Almost surely, 2^228205165 is an apocalyptic number.

It is an amenable number.

228205165 is a deficient number, since it is larger than the sum of its proper divisors (47225003).

228205165 is a wasteful number, since it uses less digits than its factorization.

228205165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263999.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 228205165 is about 15106.4610349347. The cubic root of 228205165 is about 611.0946616754.

Adding to 228205165 its reverse (561502822), we get a palindrome (789707987).

The spelling of 228205165 in words is "two hundred twenty-eight million, two hundred five thousand, one hundred sixty-five".