550710221 has 2 divisors, whose sum is σ = 550710222. Its totient is φ = 550710220.

The previous prime is 550710191. The next prime is 550710239. The reversal of 550710221 is 122017055.

It is a happy number.

550710221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 472192900 + 78517321 = 21730^2 + 8861^2 .

It is a cyclic number.

It is not a de Polignac number, because 550710221 - 2¹⁸ = 550448077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (550710241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275355110 + 275355111.

It is an arithmetic number, because the mean of its divisors is an integer number (275355111).

Almost surely, 2^550710221 is an apocalyptic number.

It is an amenable number.

550710221 is a deficient number, since it is larger than the sum of its proper divisors (1).

550710221 is an equidigital number, since it uses as much as digits as its factorization.

550710221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 550710221 is about 23467.2158766224. The cubic root of 550710221 is about 819.6737850738.

Adding to 550710221 its reverse (122017055), we get a palindrome (672727276).

The spelling of 550710221 in words is "five hundred fifty million, seven hundred ten thousand, two hundred twenty-one".