111143228 has 24 divisors (see below), whose sum is σ = 224493024. Its totient is φ = 47160000.

The previous prime is 111143209. The next prime is 111143237. The reversal of 111143228 is 822341111.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16823 + ... + 22478.

It is an arithmetic number, because the mean of its divisors is an integer number (9353876).

Almost surely, 2^111143228 is an apocalyptic number.

It is an amenable number.

111143228 is an abundant number, since it is smaller than the sum of its proper divisors (113349796).

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

111143228 is a wasteful number, since it uses less digits than its factorization.

111143228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39413 (or 39411 counting only the distinct ones).

The product of its digits is 384, while the sum is 23.

The square root of 111143228 is about 10542.4488616260. The cubic root of 111143228 is about 480.7961728760.

Adding to 111143228 its reverse (822341111), we get a palindrome (933484339).

The spelling of 111143228 in words is "one hundred eleven million, one hundred forty-three thousand, two hundred twenty-eight".