22220224 has 56 divisors (see below), whose sum is σ = 50310288. Its totient is φ = 9646080.

The previous prime is 22220213. The next prime is 22220227. The reversal of 22220224 is 42202222.

It is a super-2 number, since 2×22220224² = 987476709220352, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 22220198 and 22220207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22220227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13359 + ... + 14929.

It is an arithmetic number, because the mean of its divisors is an integer number (898398).

Almost surely, 2^22220224 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 22220224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25155144).

22220224 is an abundant number, since it is smaller than the sum of its proper divisors (28090064).

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

22220224 is a wasteful number, since it uses less digits than its factorization.

22220224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1613 (or 1603 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 22220224 is about 4713.8332596731. The cubic root of 22220224 is about 281.1357946852.

Adding to 22220224 its reverse (42202222), we get a palindrome (64422446).

The spelling of 22220224 in words is "twenty-two million, two hundred twenty thousand, two hundred twenty-four".