550636221 has 8 divisors (see below), whose sum is σ = 736032544. Its totient is φ = 366165360.

The previous prime is 550636211. The next prime is 550636271. The reversal of 550636221 is 122636055.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 550636221 - 2¹⁵ = 550603453 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 (550636211) 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 7 ways as a sum of consecutive naturals, for example, 229975 + ... + 232356.

It is an arithmetic number, because the mean of its divisors is an integer number (92004068).

Almost surely, 2^550636221 is an apocalyptic number.

It is an amenable number.

550636221 is a deficient number, since it is larger than the sum of its proper divisors (185396323).

550636221 is a wasteful number, since it uses less digits than its factorization.

550636221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462731.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 550636221 is about 23465.6391560085. The cubic root of 550636221 is about 819.6370697108.

The spelling of 550636221 in words is "five hundred fifty million, six hundred thirty-six thousand, two hundred twenty-one".