155568228 has 48 divisors (see below), whose sum is σ = 383394816. Its totient is φ = 48996640.

The previous prime is 155568221. The next prime is 155568247. The reversal of 155568228 is 822865551.

It is a self number, because there is not a number n which added to its sum of digits gives 155568228.

It is not an unprimeable number, because it can be changed into a prime (155568221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19513 + ... + 26303.

It is an arithmetic number, because the mean of its divisors is an integer number (7987392).

Almost surely, 2^155568228 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155568228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191697408).

155568228 is an abundant number, since it is smaller than the sum of its proper divisors (227826588).

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

155568228 is a wasteful number, since it uses less digits than its factorization.

155568228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6904 (or 6902 counting only the distinct ones).

The product of its digits is 192000, while the sum is 42.

The square root of 155568228 is about 12472.6993068862. The cubic root of 155568228 is about 537.8241526246.

The spelling of 155568228 in words is "one hundred fifty-five million, five hundred sixty-eight thousand, two hundred twenty-eight".