550566209 has 8 divisors (see below), whose sum is σ = 560302080. Its totient is φ = 540914976.

The previous prime is 550566197. The next prime is 550566221. The reversal of 550566209 is 902665055.

It is an interprime number because it is at equal distance from previous prime (550566197) and next prime (550566221).

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 550566209 - 2¹⁶ = 550500673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (550566239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7964 + ... + 34125.

It is an arithmetic number, because the mean of its divisors is an integer number (70037760).

Almost surely, 2^550566209 is an apocalyptic number.

It is an amenable number.

550566209 is a deficient number, since it is larger than the sum of its proper divisors (9735871).

550566209 is a wasteful number, since it uses less digits than its factorization.

550566209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42319.

The product of its (nonzero) digits is 81000, while the sum is 38.

The square root of 550566209 is about 23464.1473103115. The cubic root of 550566209 is about 819.6023299796.

The spelling of 550566209 in words is "five hundred fifty million, five hundred sixty-six thousand, two hundred nine".