550556221204311 has 16 divisors (see below), whose sum is σ = 838943176041984. Its totient is φ = 314603418932064.

The previous prime is 550556221204243. The next prime is 550556221204313. The reversal of 550556221204311 is 113402122655055.

It is a happy number.

It is not a de Polignac number, because 550556221204311 - 2³⁰ = 550555147462487 is a prime.

It is a super-2 number, since 2×550556221204311² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550556221204313) 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, 63917566 + ... + 72017828.

It is an arithmetic number, because the mean of its divisors is an integer number (52433948502624).

Almost surely, 2^{550556221204311} is an apocalyptic number.

550556221204311 is a deficient number, since it is larger than the sum of its proper divisors (288386954837673).

550556221204311 is a wasteful number, since it uses less digits than its factorization.

550556221204311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11336830.

The product of its (nonzero) digits is 360000, while the sum is 42.

Adding to 550556221204311 its reverse (113402122655055), we get a palindrome (663958343859366).

The spelling of 550556221204311 in words is "five hundred fifty trillion, five hundred fifty-six billion, two hundred twenty-one million, two hundred four thousand, three hundred eleven".