204123055 has 4 divisors (see below), whose sum is σ = 244947672. Its totient is φ = 163298440.

The previous prime is 204123041. The next prime is 204123077. The reversal of 204123055 is 550321402.

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

It is not a de Polignac number, because 204123055 - 2¹¹ = 204121007 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, 20412301 + ... + 20412310.

It is an arithmetic number, because the mean of its divisors is an integer number (61236918).

Almost surely, 2^204123055 is an apocalyptic number.

204123055 is a deficient number, since it is larger than the sum of its proper divisors (40824617).

204123055 is an equidigital number, since it uses as much as digits as its factorization.

204123055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40824616.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 204123055 is about 14287.1639942992. The cubic root of 204123055 is about 588.7948732407.

Adding to 204123055 its reverse (550321402), we get a palindrome (754444457).

The spelling of 204123055 in words is "two hundred four million, one hundred twenty-three thousand, fifty-five".