205555216110242 has 8 divisors (see below), whose sum is σ = 311797237920300. Its totient is φ = 101622803470144.

The previous prime is 205555216110173. The next prime is 205555216110271. The reversal of 205555216110242 is 242011612555502.

It can be written as a sum of positive squares in 2 ways, for example, as 195553626434401 + 10001589675841 = 13984049^2 + 3162529^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 205555216110242.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 577402292267 + ... + 577402292622.

Almost surely, 2^{205555216110242} is an apocalyptic number.

205555216110242 is a deficient number, since it is larger than the sum of its proper divisors (106242021810058).

205555216110242 is a wasteful number, since it uses less digits than its factorization.

205555216110242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1154804584980.

The product of its (nonzero) digits is 240000, while the sum is 41.

Adding to 205555216110242 its reverse (242011612555502), we get a palindrome (447566828665744).

The spelling of 205555216110242 in words is "two hundred five trillion, five hundred fifty-five billion, two hundred sixteen million, one hundred ten thousand, two hundred forty-two".