204424513 has 2 divisors, whose sum is σ = 204424514. Its totient is φ = 204424512.

The previous prime is 204424501. The next prime is 204424531. The reversal of 204424513 is 315424402.

It is a happy number.

Together with next prime (204424531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201838849 + 2585664 = 14207^2 + 1608^2 .

It is a cyclic number.

It is not a de Polignac number, because 204424513 - 2²⁵ = 170870081 is a prime.

It is not a weakly prime, because it can be changed into another prime (204424543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102212256 + 102212257.

It is an arithmetic number, because the mean of its divisors is an integer number (102212257).

Almost surely, 2^204424513 is an apocalyptic number.

It is an amenable number.

204424513 is a deficient number, since it is larger than the sum of its proper divisors (1).

204424513 is an equidigital number, since it uses as much as digits as its factorization.

204424513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 204424513 is about 14297.7100614049. The cubic root of 204424513 is about 589.0845834812.

Adding to 204424513 its reverse (315424402), we get a palindrome (519848915).

The spelling of 204424513 in words is "two hundred four million, four hundred twenty-four thousand, five hundred thirteen".