222533220 has 192 divisors, whose sum is σ = 782369280. Its totient is φ = 46006272.

The previous prime is 222533183. The next prime is 222533239. The reversal of 222533220 is 22335222.

222533220 = 106² + 107² + ... + 874².

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 288996 + ... + 289764.

It is an arithmetic number, because the mean of its divisors is an integer number (4074840).

Almost surely, 2^222533220 is an apocalyptic number.

222533220 is a gapful number since it is divisible by the number (20) 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 222533220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (391184640).

222533220 is an abundant number, since it is smaller than the sum of its proper divisors (559836060).

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

222533220 is a wasteful number, since it uses less digits than its factorization.

222533220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854 (or 852 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 222533220 is about 14917.5473855457. The cubic root of 222533220 is about 605.9892927995.

Adding to 222533220 its reverse (22335222), we get a palindrome (244868442).

The spelling of 222533220 in words is "two hundred twenty-two million, five hundred thirty-three thousand, two hundred twenty".