22111228 has 12 divisors (see below), whose sum is σ = 38990952. Its totient is φ = 10970960.

The previous prime is 22111207. The next prime is 22111241. The reversal of 22111228 is 82211122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20575 + ... + 21622.

It is an arithmetic number, because the mean of its divisors is an integer number (3249246).

Almost surely, 2^22111228 is an apocalyptic number.

It is an amenable number.

22111228 is a deficient number, since it is larger than the sum of its proper divisors (16879724).

22111228 is a wasteful number, since it uses less digits than its factorization.

22111228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42332 (or 42330 counting only the distinct ones).

The product of its digits is 128, while the sum is 19.

The square root of 22111228 is about 4702.2577555893. The cubic root of 22111228 is about 280.6753595202.

It can be divided in two parts, 221 and 11228, that added together give a square (11449 = 107²).

The spelling of 22111228 in words is "twenty-two million, one hundred eleven thousand, two hundred twenty-eight".