228165109 has 8 divisors (see below), whose sum is σ = 241883928. Its totient is φ = 214479360.

The previous prime is 228165107. The next prime is 228165131. The reversal of 228165109 is 901561822.

It can be written as a sum of positive squares in 4 ways, for example, as 188512900 + 39652209 = 13730^2 + 6297^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 228165109 - 2¹ = 228165107 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 (228165107) 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, 6739 + ... + 22399.

It is an arithmetic number, because the mean of its divisors is an integer number (30235491).

Almost surely, 2^228165109 is an apocalyptic number.

It is an amenable number.

228165109 is a deficient number, since it is larger than the sum of its proper divisors (13718819).

228165109 is a wasteful number, since it uses less digits than its factorization.

228165109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16535.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 228165109 is about 15105.1351864192. The cubic root of 228165109 is about 611.0589051956.

The spelling of 228165109 in words is "two hundred twenty-eight million, one hundred sixty-five thousand, one hundred nine".