204315535055 has 4 divisors (see below), whose sum is σ = 245178642072. Its totient is φ = 163452428040.

The previous prime is 204315535051. The next prime is 204315535057. The reversal of 204315535055 is 550535513402.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 204315535055 - 2² = 204315535051 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204315535051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20431553501 + ... + 20431553510.

It is an arithmetic number, because the mean of its divisors is an integer number (61294660518).

Almost surely, 2^204315535055 is an apocalyptic number.

204315535055 is a deficient number, since it is larger than the sum of its proper divisors (40863107017).

204315535055 is an equidigital number, since it uses as much as digits as its factorization.

204315535055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40863107016.

The product of its (nonzero) digits is 225000, while the sum is 38.

The spelling of 204315535055 in words is "two hundred four billion, three hundred fifteen million, five hundred thirty-five thousand, fifty-five".