205050055 has 12 divisors (see below), whose sum is σ = 286233480. Its totient is φ = 140605584.

The previous prime is 205050023. The next prime is 205050067. The reversal of 205050055 is 550050502.

It is not a de Polignac number, because 205050055 - 2⁵ = 205050023 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 418225 + ... + 418714.

It is an arithmetic number, because the mean of its divisors is an integer number (23852790).

Almost surely, 2^205050055 is an apocalyptic number.

205050055 is a deficient number, since it is larger than the sum of its proper divisors (81183425).

205050055 is an equidigital number, since it uses as much as digits as its factorization.

205050055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836958 (or 836951 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 22.

The square root of 205050055 is about 14319.5689530097. The cubic root of 205050055 is about 589.6848407790.

The spelling of 205050055 in words is "two hundred five million, fifty thousand, fifty-five".