204515132513 has 2 divisors, whose sum is σ = 204515132514. Its totient is φ = 204515132512.

The previous prime is 204515132489. The next prime is 204515132527. The reversal of 204515132513 is 315231515402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204514686289 + 446224 = 452233^2 + 668^2 .

It is a cyclic number.

It is not a de Polignac number, because 204515132513 - 2²⁰ = 204514083937 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204515132513.

It is not a weakly prime, because it can be changed into another prime (204515132413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102257566256 + 102257566257.

It is an arithmetic number, because the mean of its divisors is an integer number (102257566257).

Almost surely, 2^204515132513 is an apocalyptic number.

It is an amenable number.

204515132513 is a deficient number, since it is larger than the sum of its proper divisors (1).

204515132513 is an equidigital number, since it uses as much as digits as its factorization.

204515132513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18000, while the sum is 32.

Adding to 204515132513 its reverse (315231515402), we get a palindrome (519746647915).

The spelling of 204515132513 in words is "two hundred four billion, five hundred fifteen million, one hundred thirty-two thousand, five hundred thirteen".