204530245 has 4 divisors (see below), whose sum is σ = 245436300. Its totient is φ = 163624192.

The previous prime is 204530239. The next prime is 204530251. The reversal of 204530245 is 542035402.

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

It is an interprime number because it is at equal distance from previous prime (204530239) and next prime (204530251).

It can be written as a sum of positive squares in 2 ways, for example, as 140801956 + 63728289 = 11866^2 + 7983^2 .

It is a cyclic number.

It is not a de Polignac number, because 204530245 - 2⁹ = 204529733 is a prime.

It is a super-2 number, since 2×204530245² = 83665242239520050, which contains 22 as substring.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 20453020 + ... + 20453029.

It is an arithmetic number, because the mean of its divisors is an integer number (61359075).

Almost surely, 2^204530245 is an apocalyptic number.

It is an amenable number.

204530245 is a deficient number, since it is larger than the sum of its proper divisors (40906055).

204530245 is an equidigital number, since it uses as much as digits as its factorization.

204530245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40906054.

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 204530245 is about 14301.4070986040. The cubic root of 204530245 is about 589.1861276568.

Adding to 204530245 its reverse (542035402), we get a palindrome (746565647).

The spelling of 204530245 in words is "two hundred four million, five hundred thirty thousand, two hundred forty-five".