228165189 has 16 divisors (see below), whose sum is σ = 350338560. Its totient is φ = 129383280.

The previous prime is 228165169. The next prime is 228165209. The reversal of 228165189 is 981561822.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (228165169) and next prime (228165209).

It is not a de Polignac number, because 228165189 - 2¹² = 228161093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 228165189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228165169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38719 + ... + 44220.

It is an arithmetic number, because the mean of its divisors is an integer number (21896160).

Almost surely, 2^228165189 is an apocalyptic number.

It is an amenable number.

228165189 is a deficient number, since it is larger than the sum of its proper divisors (122173371).

228165189 is a wasteful number, since it uses less digits than its factorization.

228165189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83080.

The product of its digits is 69120, while the sum is 42.

The square root of 228165189 is about 15105.1378345250. The cubic root of 228165189 is about 611.0589766128.

The spelling of 228165189 in words is "two hundred twenty-eight million, one hundred sixty-five thousand, one hundred eighty-nine".