204020522243 has 4 divisors (see below), whose sum is σ = 204027080280. Its totient is φ = 204013964208.

The previous prime is 204020522203. The next prime is 204020522257. The reversal of 204020522243 is 342225020402.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204020522243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204020522203) 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, 3232130 + ... + 3294647.

It is an arithmetic number, because the mean of its divisors is an integer number (51006770070).

Almost surely, 2^204020522243 is an apocalyptic number.

204020522243 is a deficient number, since it is larger than the sum of its proper divisors (6558037).

204020522243 is an equidigital number, since it uses as much as digits as its factorization.

204020522243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6558036.

The product of its (nonzero) digits is 7680, while the sum is 26.

Adding to 204020522243 its reverse (342225020402), we get a palindrome (546245542645).

The spelling of 204020522243 in words is "two hundred four billion, twenty million, five hundred twenty-two thousand, two hundred forty-three".