550581220 has 24 divisors (see below), whose sum is σ = 1321395264. Its totient is φ = 188770656.

The previous prime is 550581203. The next prime is 550581289. The reversal of 550581220 is 22185055.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1966222 + ... + 1966501.

It is an arithmetic number, because the mean of its divisors is an integer number (55058136).

Almost surely, 2^550581220 is an apocalyptic number.

It is an amenable number.

550581220 is an abundant number, since it is smaller than the sum of its proper divisors (770814044).

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

550581220 is a wasteful number, since it uses less digits than its factorization.

550581220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3932739 (or 3932737 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 550581220 is about 23464.4671791200. The cubic root of 550581220 is about 819.6097786380.

The spelling of 550581220 in words is "five hundred fifty million, five hundred eighty-one thousand, two hundred twenty".