205520035055 has 4 divisors (see below), whose sum is σ = 246624042072. Its totient is φ = 164416028040.

The previous prime is 205520035033. The next prime is 205520035151. The reversal of 205520035055 is 550530025502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 550530025502 = 2 ⋅275265012751.

It is a de Polignac number, because none of the positive numbers 2^k-205520035055 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 20552003501 + ... + 20552003510.

It is an arithmetic number, because the mean of its divisors is an integer number (61656010518).

Almost surely, 2^205520035055 is an apocalyptic number.

205520035055 is a deficient number, since it is larger than the sum of its proper divisors (41104007017).

205520035055 is an equidigital number, since it uses as much as digits as its factorization.

205520035055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41104007016.

The product of its (nonzero) digits is 37500, while the sum is 32.

The spelling of 205520035055 in words is "two hundred five billion, five hundred twenty million, thirty-five thousand, fifty-five".