165228228 has 96 divisors (see below), whose sum is σ = 487710720. Its totient is φ = 47884320.

The previous prime is 165228227. The next prime is 165228247. The reversal of 165228228 is 822822561.

165228228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 165228192 and 165228201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165228227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24301 + ... + 30347.

It is an arithmetic number, because the mean of its divisors is an integer number (5080320).

Almost surely, 2^165228228 is an apocalyptic number.

165228228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165228228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243855360).

165228228 is an abundant number, since it is smaller than the sum of its proper divisors (322482492).

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

165228228 is a wasteful number, since it uses less digits than its factorization.

165228228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6094 (or 6086 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 165228228 is about 12854.1132716341. The cubic root of 165228228 is about 548.7334248828.

The spelling of 165228228 in words is "one hundred sixty-five million, two hundred twenty-eight thousand, two hundred twenty-eight".