550010221 has 4 divisors (see below), whose sum is σ = 559026844. Its totient is φ = 540993600.

The previous prime is 550010191. The next prime is 550010243. The reversal of 550010221 is 122010055.

550010221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 257121225 + 292888996 = 16035^2 + 17114^2 .

It is a cyclic number.

It is not a de Polignac number, because 550010221 - 2⁵ = 550010189 is a prime.

It is a super-2 number, since 2×550010221² = 605022486408937682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 550010195 and 550010204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550019221) 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, 4508220 + ... + 4508341.

It is an arithmetic number, because the mean of its divisors is an integer number (139756711).

Almost surely, 2^550010221 is an apocalyptic number.

It is an amenable number.

550010221 is a deficient number, since it is larger than the sum of its proper divisors (9016623).

550010221 is an equidigital number, since it uses as much as digits as its factorization.

550010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9016622.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 550010221 is about 23452.2967105569. The cubic root of 550010221 is about 819.3263458921.

Adding to 550010221 its reverse (122010055), we get a palindrome (672020276).

The spelling of 550010221 in words is "five hundred fifty million, ten thousand, two hundred twenty-one".