550333321 has 4 divisors (see below), whose sum is σ = 550511892. Its totient is φ = 550154752.

The previous prime is 550333249. The next prime is 550333327. The reversal of 550333321 is 123333055.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 379665225 + 170668096 = 19485^2 + 13064^2 .

It is a cyclic number.

It is not a de Polignac number, because 550333321 - 2⁷ = 550333193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (550333327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84580 + ... + 90853.

It is an arithmetic number, because the mean of its divisors is an integer number (137627973).

Almost surely, 2^550333321 is an apocalyptic number.

It is an amenable number.

550333321 is a deficient number, since it is larger than the sum of its proper divisors (178571).

550333321 is a wasteful number, since it uses less digits than its factorization.

550333321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178570.

The product of its (nonzero) digits is 4050, while the sum is 25.

The square root of 550333321 is about 23459.1841503493. The cubic root of 550333321 is about 819.4867505005.

Adding to 550333321 its reverse (123333055), we get a palindrome (673666376).

The spelling of 550333321 in words is "five hundred fifty million, three hundred thirty-three thousand, three hundred twenty-one".