550534221 has 6 divisors (see below), whose sum is σ = 795216110. Its totient is φ = 367022808.

The previous prime is 550534189. The next prime is 550534297. The reversal of 550534221 is 122435055.

It is a happy number.

550534221 is a `hidden beast` number, since 550 + 53 + 42 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 444155625 + 106378596 = 21075^2 + 10314^2 .

It is not a de Polignac number, because 550534221 - 2⁵ = 550534189 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 (550534121) 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 5 ways as a sum of consecutive naturals, for example, 30585226 + ... + 30585243.

Almost surely, 2^550534221 is an apocalyptic number.

It is an amenable number.

550534221 is a deficient number, since it is larger than the sum of its proper divisors (244681889).

550534221 is a wasteful number, since it uses less digits than its factorization.

550534221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61170475 (or 61170472 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 550534221 is about 23463.4656647308. The cubic root of 550534221 is about 819.5864566559.

Adding to 550534221 its reverse (122435055), we get a palindrome (672969276).

The spelling of 550534221 in words is "five hundred fifty million, five hundred thirty-four thousand, two hundred twenty-one".