204242245 has 4 divisors (see below), whose sum is σ = 245090700. Its totient is φ = 163393792.

The previous prime is 204242239. The next prime is 204242249. The reversal of 204242245 is 542242402.

204242245 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 148620481 + 55621764 = 12191^2 + 7458^2 .

It is a cyclic number.

It is not a de Polignac number, because 204242245 - 2³ = 204242237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204242249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20424220 + ... + 20424229.

It is an arithmetic number, because the mean of its divisors is an integer number (61272675).

Almost surely, 2^204242245 is an apocalyptic number.

It is an amenable number.

204242245 is a deficient number, since it is larger than the sum of its proper divisors (40848455).

204242245 is an equidigital number, since it uses as much as digits as its factorization.

204242245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40848454.

The product of its (nonzero) digits is 5120, while the sum is 25.

The square root of 204242245 is about 14291.3346122747. The cubic root of 204242245 is about 588.9094525011.

Adding to 204242245 its reverse (542242402), we get a palindrome (746484647).

The spelling of 204242245 in words is "two hundred four million, two hundred forty-two thousand, two hundred forty-five".