204431020055 has 8 divisors (see below), whose sum is σ = 247698945312. Its totient is φ = 161957001888.

The previous prime is 204431020039. The next prime is 204431020093. The reversal of 204431020055 is 550020134402.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 204431020055 - 2⁴ = 204431020039 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 7 ways as a sum of consecutive naturals, for example, 198476204 + ... + 198477233.

It is an arithmetic number, because the mean of its divisors is an integer number (30962368164).

Almost surely, 2^204431020055 is an apocalyptic number.

204431020055 is a deficient number, since it is larger than the sum of its proper divisors (43267925257).

204431020055 is a wasteful number, since it uses less digits than its factorization.

204431020055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396953545.

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 204431020055 its reverse (550020134402), we get a palindrome (754451154457).

The spelling of 204431020055 in words is "two hundred four billion, four hundred thirty-one million, twenty thousand, fifty-five".