550040321 has 8 divisors (see below), whose sum is σ = 582681600. Its totient is φ = 517430848.

The previous prime is 550040263. The next prime is 550040353. The reversal of 550040321 is 123040055.

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 550040321 - 2¹⁰ = 550039297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 550040293 and 550040302.

It is not an unprimeable number, because it can be changed into a prime (550040371) 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 7 ways as a sum of consecutive naturals, for example, 34040 + ... + 47526.

It is an arithmetic number, because the mean of its divisors is an integer number (72835200).

Almost surely, 2^550040321 is an apocalyptic number.

It is an amenable number.

550040321 is a deficient number, since it is larger than the sum of its proper divisors (32641279).

550040321 is a wasteful number, since it uses less digits than its factorization.

550040321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15903.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 550040321 is about 23452.9384299708. The cubic root of 550040321 is about 819.3412918405.

Adding to 550040321 its reverse (123040055), we get a palindrome (673080376).

The spelling of 550040321 in words is "five hundred fifty million, forty thousand, three hundred twenty-one".