205051142055 has 16 divisors (see below), whose sum is σ = 328129949664. Its totient is φ = 109344568320.

The previous prime is 205051142017. The next prime is 205051142063. The reversal of 205051142055 is 550241150502.

It is not a de Polignac number, because 205051142055 - 2³⁶ = 136331665319 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 896514 + ... + 1101743.

It is an arithmetic number, because the mean of its divisors is an integer number (20508121854).

Almost surely, 2^205051142055 is an apocalyptic number.

205051142055 is a deficient number, since it is larger than the sum of its proper divisors (123078807609).

205051142055 is a wasteful number, since it uses less digits than its factorization.

205051142055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2005106.

The product of its (nonzero) digits is 10000, while the sum is 30.

Adding to 205051142055 its reverse (550241150502), we get a palindrome (755292292557).

The spelling of 205051142055 in words is "two hundred five billion, fifty-one million, one hundred forty-two thousand, fifty-five".