8550220 has 48 divisors (see below), whose sum is σ = 20704320. Its totient is φ = 2905344.

The previous prime is 8550211. The next prime is 8550229. The reversal of 8550220 is 220558.

It is an interprime number because it is at equal distance from previous prime (8550211) and next prime (8550229).

It is a junction number, because it is equal to n+sod(n) for n = 8550191 and 8550200.

It is not an unprimeable number, because it can be changed into a prime (8550229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21786 + ... + 22174.

It is an arithmetic number, because the mean of its divisors is an integer number (431340).

Almost surely, 2^8550220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8550220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10352160).

8550220 is an abundant number, since it is smaller than the sum of its proper divisors (12154100).

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

8550220 is a wasteful number, since it uses less digits than its factorization.

8550220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562 (or 560 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 8550220 is about 2924.0759224069. The cubic root of 8550220 is about 204.4838891108.

Adding to 8550220 its reverse (220558), we get a palindrome (8770778).

It can be divided in two parts, 85 and 50220, that added together give a palindrome (50305).

The spelling of 8550220 in words is "eight million, five hundred fifty thousand, two hundred twenty".