4220550 has 72 divisors (see below), whose sum is σ = 11577384. Its totient is φ = 1102080.

The previous prime is 4220543. The next prime is 4220551. The reversal of 4220550 is 550224.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4220551) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 37294 + ... + 37406.

It is an arithmetic number, because the mean of its divisors is an integer number (160797).

Almost surely, 2^4220550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4220550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5788692).

4220550 is an abundant number, since it is smaller than the sum of its proper divisors (7356834).

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

4220550 is a wasteful number, since it uses less digits than its factorization.

4220550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214 (or 206 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 4220550 is about 2054.3977219614. The cubic root of 4220550 is about 161.6055791215.

Adding to 4220550 its reverse (550224), we get a palindrome (4770774).

The spelling of 4220550 in words is "four million, two hundred twenty thousand, five hundred fifty".