222217344 has 80 divisors (see below), whose sum is σ = 661346070. Its totient is φ = 74068992.

The previous prime is 222217339. The next prime is 222217357. The reversal of 222217344 is 443712222.

It can be written as a sum of positive squares in only one way, i.e., 217857600 + 4359744 = 14760^2 + 2088^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 349 + ... + 21084.

Almost surely, 2^222217344 is an apocalyptic number.

222217344 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 222217344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (330673035).

222217344 is an abundant number, since it is smaller than the sum of its proper divisors (439128726).

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

222217344 is an equidigital number, since it uses as much as digits as its factorization.

222217344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21459 (or 21438 counting only the distinct ones).

The product of its digits is 5376, while the sum is 27.

The square root of 222217344 is about 14906.9562285532. The cubic root of 222217344 is about 605.7024320859.

Adding to 222217344 its reverse (443712222), we get a palindrome (665929566).

The spelling of 222217344 in words is "two hundred twenty-two million, two hundred seventeen thousand, three hundred forty-four".