222220224 has 84 divisors (see below), whose sum is σ = 654231864. Its totient is φ = 72064512.

The previous prime is 222220223. The next prime is 222220241. The reversal of 222220224 is 422022222.

It is a happy number.

222220224 is a `hidden beast` number, since 222 + 220 + 224 = 666.

It is a super-2 number, since 2×222220224² = 98763655909220352, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 222220197 and 222220206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222220223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16099 + ... + 26525.

Almost surely, 2^222220224 is an apocalyptic number.

222220224 is a gapful number since it is divisible by the number (24) 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 222220224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (327115932).

222220224 is an abundant number, since it is smaller than the sum of its proper divisors (432011640).

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

222220224 is a wasteful number, since it uses less digits than its factorization.

222220224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10482 (or 10469 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 222220224 is about 14907.0528274371. The cubic root of 222220224 is about 605.7050487666.

Adding to 222220224 its reverse (422022222), we get a palindrome (644242446).

The spelling of 222220224 in words is "two hundred twenty-two million, two hundred twenty thousand, two hundred twenty-four".