205013519 has 2 divisors, whose sum is σ = 205013520. Its totient is φ = 205013518.

The previous prime is 205013491. The next prime is 205013539. The reversal of 205013519 is 915310502.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205013519 is a prime.

It is a super-2 number, since 2×205013519² = 84061085945526722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205013539) by changing a digit.

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 as a sum of consecutive naturals, namely, 102506759 + 102506760.

It is an arithmetic number, because the mean of its divisors is an integer number (102506760).

Almost surely, 2^205013519 is an apocalyptic number.

205013519 is a deficient number, since it is larger than the sum of its proper divisors (1).

205013519 is an equidigital number, since it uses as much as digits as its factorization.

205013519 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 205013519 is about 14318.2931594517. The cubic root of 205013519 is about 589.6498151766.

The spelling of 205013519 in words is "two hundred five million, thirteen thousand, five hundred nineteen".