4221822 has 32 divisors (see below), whose sum is σ = 9414144. Its totient is φ = 1251200.

The previous prime is 4221799. The next prime is 4221827. The reversal of 4221822 is 2281224.

It is a happy number.

4221822 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4221827) 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, 2422 + ... + 3782.

It is an arithmetic number, because the mean of its divisors is an integer number (294192).

Almost surely, 2^4221822 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4221822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4707072).

4221822 is an abundant number, since it is smaller than the sum of its proper divisors (5192322).

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

4221822 is a wasteful number, since it uses less digits than its factorization.

4221822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1424.

The product of its digits is 512, while the sum is 21.

The square root of 4221822 is about 2054.7072784219. The cubic root of 4221822 is about 161.6218125231.

The spelling of 4221822 in words is "four million, two hundred twenty-one thousand, eight hundred twenty-two".