204420245 has 8 divisors (see below), whose sum is σ = 245906520. Its totient is φ = 163134720.

The previous prime is 204420241. The next prime is 204420269. The reversal of 204420245 is 542024402.

204420245 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 37442161 + 166978084 = 6119^2 + 12922^2 .

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

It is not a de Polignac number, because 204420245 - 2² = 204420241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204420245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204420241) 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, 47936 + ... + 52025.

It is an arithmetic number, because the mean of its divisors is an integer number (30738315).

Almost surely, 2^204420245 is an apocalyptic number.

It is an amenable number.

204420245 is a deficient number, since it is larger than the sum of its proper divisors (41486275).

204420245 is an equidigital number, since it uses as much as digits as its factorization.

204420245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100375.

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 204420245 is about 14297.5608059557. The cubic root of 204420245 is about 589.0804837926.

Adding to 204420245 its reverse (542024402), we get a palindrome (746444647).

The spelling of 204420245 in words is "two hundred four million, four hundred twenty thousand, two hundred forty-five".