550233221 has 4 divisors (see below), whose sum is σ = 552177792. Its totient is φ = 548288652.

The previous prime is 550233181. The next prime is 550233223. The reversal of 550233221 is 122332055.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 550233221 - 2²² = 546038917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550233223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 971861 + ... + 972426.

It is an arithmetic number, because the mean of its divisors is an integer number (138044448).

Almost surely, 2^550233221 is an apocalyptic number.

It is an amenable number.

550233221 is a deficient number, since it is larger than the sum of its proper divisors (1944571).

550233221 is a wasteful number, since it uses less digits than its factorization.

550233221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1944570.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 550233221 is about 23457.0505605458. The cubic root of 550233221 is about 819.4370620695.

Adding to 550233221 its reverse (122332055), we get a palindrome (672565276).

The spelling of 550233221 in words is "five hundred fifty million, two hundred thirty-three thousand, two hundred twenty-one".