228165169 has 2 divisors, whose sum is σ = 228165170. Its totient is φ = 228165168.

The previous prime is 228165151. The next prime is 228165209. The reversal of 228165169 is 961561822.

It is an a-pointer prime, because the next prime (228165209) can be obtained adding 228165169 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 227617569 + 547600 = 15087^2 + 740^2 .

It is a cyclic number.

It is not a de Polignac number, because 228165169 - 2¹¹ = 228163121 is a prime.

It is a super-2 number, since 2×228165169² = 104118688689597122, which contains 22 as substring.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (228160169) 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 as a sum of consecutive naturals, namely, 114082584 + 114082585.

It is an arithmetic number, because the mean of its divisors is an integer number (114082585).

Almost surely, 2^228165169 is an apocalyptic number.

It is an amenable number.

228165169 is a deficient number, since it is larger than the sum of its proper divisors (1).

228165169 is an equidigital number, since it uses as much as digits as its factorization.

228165169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 40.

The square root of 228165169 is about 15105.1371724986. The cubic root of 228165169 is about 611.0589587585.

The spelling of 228165169 in words is "two hundred twenty-eight million, one hundred sixty-five thousand, one hundred sixty-nine".