2221220 has 48 divisors (see below), whose sum is σ = 5080320. Its totient is φ = 812544.

The previous prime is 2221217. The next prime is 2221229. The reversal of 2221220 is 221222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15911 + ... + 16049.

It is an arithmetic number, because the mean of its divisors is an integer number (105840).

2^2221220 is an apocalyptic number.

2221220 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 2221220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2540160).

2221220 is an abundant number, since it is smaller than the sum of its proper divisors (2859100).

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

2221220 is a wasteful number, since it uses less digits than its factorization.

2221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212 (or 210 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 2221220 is about 1490.3757915372. The cubic root of 2221220 is about 130.4759672523.

Adding to 2221220 its reverse (221222), we get a palindrome (2442442).

The spelling of 2221220 in words is "two million, two hundred twenty-one thousand, two hundred twenty".