204003422261 has 2 divisors, whose sum is σ = 204003422262. Its totient is φ = 204003422260.

The previous prime is 204003422201. The next prime is 204003422263. The reversal of 204003422261 is 162224300402.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160168044100 + 43835378161 = 400210^2 + 209369^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204003422261 is a prime.

Together with 204003422263, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204003422261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204003422263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102001711130 + 102001711131.

It is an arithmetic number, because the mean of its divisors is an integer number (102001711131).

Almost surely, 2^204003422261 is an apocalyptic number.

It is an amenable number.

204003422261 is a deficient number, since it is larger than the sum of its proper divisors (1).

204003422261 is an equidigital number, since it uses as much as digits as its factorization.

204003422261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 204003422261 its reverse (162224300402), we get a palindrome (366227722663).

The spelling of 204003422261 in words is "two hundred four billion, three million, four hundred twenty-two thousand, two hundred sixty-one".