222220 has 24 divisors (see below), whose sum is σ = 479808. Its totient is φ = 86400.

The previous prime is 222199. The next prime is 222247. The reversal of 222220 is 22222.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 222197 and 222206.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 685 + ... + 955.

It is an arithmetic number, because the mean of its divisors is an integer number (19992).

2²²²²²⁰ is an apocalyptic number.

222220 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 222220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239904).

222220 is an abundant number, since it is smaller than the sum of its proper divisors (257588).

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

222220 is a wasteful number, since it uses less digits than its factorization.

222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321 (or 319 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 10.

The square root of 222220 is about 471.4021637625. The cubic root of 222220 is about 60.5704845248.

222220 divided by its sum of digits (10) gives a palindrome (22222).

Adding to 222220 its reverse (22222), we get a palindrome (244442).

It can be divided in two parts, 2 and 22220, that added together give a palindrome (22222).

The spelling of 222220 in words is "two hundred twenty-two thousand, two hundred twenty", and thus it is an iban number.