550559 has 4 divisors (see below), whose sum is σ = 555720. Its totient is φ = 545400.

The previous prime is 550553. The next prime is 550577. The reversal of 550559 is 955055.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-550559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 550559.

It is not an unprimeable number, because it can be changed into a prime (550553) 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 3 ways as a sum of consecutive naturals, for example, 2417 + ... + 2634.

It is an arithmetic number, because the mean of its divisors is an integer number (138930).

2⁵⁵⁰⁵⁵⁹ is an apocalyptic number.

550559 is a deficient number, since it is larger than the sum of its proper divisors (5161).

550559 is a wasteful number, since it uses less digits than its factorization.

550559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5160.

The product of its (nonzero) digits is 5625, while the sum is 29.

The square root of 550559 is about 741.9966307201. The cubic root of 550559 is about 81.9598752730.

Subtracting 550559 from its reverse (955055), we obtain a square (404496 = 636²).

The spelling of 550559 in words is "five hundred fifty thousand, five hundred fifty-nine".