550209 has 8 divisors (see below), whose sum is σ = 800352. Its totient is φ = 333440.

The previous prime is 550189. The next prime is 550211. The reversal of 550209 is 902055.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 550209 - 2⁵ = 550177 is a prime.

It is a Curzon number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (550279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8304 + ... + 8369.

It is an arithmetic number, because the mean of its divisors is an integer number (100044).

2⁵⁵⁰²⁰⁹ is an apocalyptic number.

It is an amenable number.

550209 is a deficient number, since it is larger than the sum of its proper divisors (250143).

550209 is a wasteful number, since it uses less digits than its factorization.

550209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16687.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 550209 is about 741.7607430971. The cubic root of 550209 is about 81.9425038152.

The spelling of 550209 in words is "five hundred fifty thousand, two hundred nine".