204021085 has 8 divisors (see below), whose sum is σ = 246613176. Its totient is φ = 162024960.

The previous prime is 204021067. The next prime is 204021089. The reversal of 204021085 is 580120402.

204021085 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 67551961 + 136469124 = 8219^2 + 11682^2 .

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

It is not a de Polignac number, because 204021085 - 2⁵ = 204021053 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 (204021089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148236 + ... + 149605.

It is an arithmetic number, because the mean of its divisors is an integer number (30826647).

Almost surely, 2^204021085 is an apocalyptic number.

It is an amenable number.

204021085 is a deficient number, since it is larger than the sum of its proper divisors (42592091).

204021085 is a wasteful number, since it uses less digits than its factorization.

204021085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297983.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 204021085 is about 14283.5949606533. The cubic root of 204021085 is about 588.6968124352.

Adding to 204021085 its reverse (580120402), we get a palindrome (784141487).

The spelling of 204021085 in words is "two hundred four million, twenty-one thousand, eighty-five".