204120355 has 12 divisors (see below), whose sum is σ = 250784640. Its totient is φ = 159491472.

The previous prime is 204120347. The next prime is 204120361. The reversal of 204120355 is 553021402.

It is not a de Polignac number, because 204120355 - 2³ = 204120347 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1795 + ... + 20284.

It is an arithmetic number, because the mean of its divisors is an integer number (20898720).

Almost surely, 2^204120355 is an apocalyptic number.

204120355 is a deficient number, since it is larger than the sum of its proper divisors (46664285).

204120355 is an equidigital number, since it uses as much as digits as its factorization.

204120355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22170 (or 22127 counting only the distinct ones).

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

The square root of 204120355 is about 14287.0695035756. The cubic root of 204120355 is about 588.7922771708.

Adding to 204120355 its reverse (553021402), we get a palindrome (757141757).

The spelling of 204120355 in words is "two hundred four million, one hundred twenty thousand, three hundred fifty-five".