550221621243 has 16 divisors (see below), whose sum is σ = 882560997120. Its totient is φ = 297864336096.

The previous prime is 550221621211. The next prime is 550221621277. The reversal of 550221621243 is 342126122055.

It is a happy number.

It is not a de Polignac number, because 550221621243 - 2⁵ = 550221621211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (550221621203) 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, 689500380 + ... + 689501177.

It is an arithmetic number, because the mean of its divisors is an integer number (55160062320).

Almost surely, 2^550221621243 is an apocalyptic number.

550221621243 is a deficient number, since it is larger than the sum of its proper divisors (332339375877).

550221621243 is a wasteful number, since it uses less digits than its factorization.

550221621243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1379001586.

The product of its (nonzero) digits is 28800, while the sum is 33.

Adding to 550221621243 its reverse (342126122055), we get a palindrome (892347743298).

The spelling of 550221621243 in words is "five hundred fifty billion, two hundred twenty-one million, six hundred twenty-one thousand, two hundred forty-three".