4215222 has 48 divisors (see below), whose sum is σ = 10155600. Its totient is φ = 1252800.

The previous prime is 4215221. The next prime is 4215227. The reversal of 4215222 is 2225124.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a d-powerful number, because it can be written as 4⁴ + 2⁷ + 1 + 5⁵ + 2¹⁰ + 2¹⁴ + 2²² .

It is a junction number, because it is equal to n+sod(n) for n = 4215195 and 4215204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4215221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11904 + ... + 12252.

It is an arithmetic number, because the mean of its divisors is an integer number (211575).

Almost surely, 2^4215222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4215222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5077800).

4215222 is an abundant number, since it is smaller than the sum of its proper divisors (5940378).

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

4215222 is a wasteful number, since it uses less digits than its factorization.

4215222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429 (or 426 counting only the distinct ones).

The product of its digits is 320, while the sum is 18.

The square root of 4215222 is about 2053.1005820466. The cubic root of 4215222 is about 161.5375471429.

The spelling of 4215222 in words is "four million, two hundred fifteen thousand, two hundred twenty-two".