165001228 has 36 divisors (see below), whose sum is σ = 336708120. Its totient is φ = 70543872.

The previous prime is 165001211. The next prime is 165001237. The reversal of 165001228 is 822100561.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 112363 + ... + 113821.

Almost surely, 2^165001228 is an apocalyptic number.

It is an amenable number.

165001228 is an abundant number, since it is smaller than the sum of its proper divisors (171706892).

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

165001228 is a wasteful number, since it uses less digits than its factorization.

165001228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2054 (or 2045 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 165001228 is about 12845.2803784114. The cubic root of 165001228 is about 548.4820159151.

Adding to 165001228 its reverse (822100561), we get a palindrome (987101789).

The spelling of 165001228 in words is "one hundred sixty-five million, one thousand, two hundred twenty-eight".