165105228 has 24 divisors (see below), whose sum is σ = 385455280. Its totient is φ = 55005120.

The previous prime is 165105209. The next prime is 165105233. The reversal of 165105228 is 822501561.

It is a junction number, because it is equal to n+sod(n) for n = 165105195 and 165105204.

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, 36618 + ... + 40878.

Almost surely, 2^165105228 is an apocalyptic number.

It is an amenable number.

165105228 is an abundant number, since it is smaller than the sum of its proper divisors (220350052).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165105228 is a wasteful number, since it uses less digits than its factorization.

165105228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7497 (or 7495 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 165105228 is about 12849.3279201677. The cubic root of 165105228 is about 548.5972274806.

Adding to 165105228 its reverse (822501561), we get a palindrome (987606789).

The spelling of 165105228 in words is "one hundred sixty-five million, one hundred five thousand, two hundred twenty-eight".