550201221 has 16 divisors (see below), whose sum is σ = 858014400. Its totient is φ = 347495184.

The previous prime is 550201163. The next prime is 550201229. The reversal of 550201221 is 122102055.

It is not a de Polignac number, because 550201221 - 2¹¹ = 550199173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 550201194 and 550201203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550201229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 535746 + ... + 536771.

It is an arithmetic number, because the mean of its divisors is an integer number (53625900).

Almost surely, 2^550201221 is an apocalyptic number.

It is an amenable number.

550201221 is a deficient number, since it is larger than the sum of its proper divisors (307813179).

550201221 is a wasteful number, since it uses less digits than its factorization.

550201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072545 (or 1072539 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 550201221 is about 23456.3684529383. The cubic root of 550201221 is about 819.4211763848.

Adding to 550201221 its reverse (122102055), we get a palindrome (672303276).

The spelling of 550201221 in words is "five hundred fifty million, two hundred one thousand, two hundred twenty-one".