550636209 has 24 divisors (see below), whose sum is σ = 805225512. Its totient is φ = 362568960.

The previous prime is 550636187. The next prime is 550636211. The reversal of 550636209 is 902636055.

It can be written as a sum of positive squares in 4 ways, for example, as 50979600 + 499656609 = 7140^2 + 22353^2 .

It is not a de Polignac number, because 550636209 - 2⁹ = 550635697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (550646209) 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 23 ways as a sum of consecutive naturals, for example, 254677 + ... + 256829.

It is an arithmetic number, because the mean of its divisors is an integer number (33551063).

Almost surely, 2^550636209 is an apocalyptic number.

It is an amenable number.

550636209 is a deficient number, since it is larger than the sum of its proper divisors (254589303).

550636209 is a wasteful number, since it uses less digits than its factorization.

550636209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2497 (or 2494 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 36.

The square root of 550636209 is about 23465.6389003155. The cubic root of 550636209 is about 819.6370637567.

The spelling of 550636209 in words is "five hundred fifty million, six hundred thirty-six thousand, two hundred nine".