550321 has 8 divisors (see below), whose sum is σ = 584064. Its totient is φ = 517440.

The previous prime is 550309. The next prime is 550337. The reversal of 550321 is 123055.

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 550321 - 2⁵ = 550289 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 550295 and 550304.

It is not an unprimeable number, because it can be changed into a prime (550351) 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, 1465 + ... + 1801.

It is an arithmetic number, because the mean of its divisors is an integer number (73008).

2⁵⁵⁰³²¹ is an apocalyptic number.

It is an amenable number.

550321 is a deficient number, since it is larger than the sum of its proper divisors (33743).

550321 is a wasteful number, since it uses less digits than its factorization.

550321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431.

The product of its (nonzero) digits is 150, while the sum is 16.

The square root of 550321 is about 741.8362352973. The cubic root of 550321 is about 81.9480634830.

Adding to 550321 its reverse (123055), we get a palindrome (673376).

The spelling of 550321 in words is "five hundred fifty thousand, three hundred twenty-one".