228165161 has 16 divisors (see below), whose sum is σ = 264945408. Its totient is φ = 192456000.

The previous prime is 228165151. The next prime is 228165169. The reversal of 228165161 is 161561822.

It is a cyclic number.

It is not a de Polignac number, because 228165161 - 2¹⁰ = 228164137 is a prime.

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, 127076 + ... + 128858.

It is an arithmetic number, because the mean of its divisors is an integer number (16559088).

Almost surely, 2^228165161 is an apocalyptic number.

It is an amenable number.

228165161 is a deficient number, since it is larger than the sum of its proper divisors (36780247).

228165161 is a wasteful number, since it uses less digits than its factorization.

228165161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2072.

The product of its digits is 5760, while the sum is 32.

The square root of 228165161 is about 15105.1369076881. The cubic root of 228165161 is about 611.0589516168.

The spelling of 228165161 in words is "two hundred twenty-eight million, one hundred sixty-five thousand, one hundred sixty-one".