205030513 has 2 divisors, whose sum is σ = 205030514. Its totient is φ = 205030512.

The previous prime is 205030499. The next prime is 205030537. The reversal of 205030513 is 315030502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201157489 + 3873024 = 14183^2 + 1968^2 .

It is a cyclic number.

It is not a de Polignac number, because 205030513 - 2⁵ = 205030481 is a prime.

It is a super-2 number, since 2×205030513² = 84075022522086338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (205030543) 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, 102515256 + 102515257.

It is an arithmetic number, because the mean of its divisors is an integer number (102515257).

Almost surely, 2^205030513 is an apocalyptic number.

It is an amenable number.

205030513 is a deficient number, since it is larger than the sum of its proper divisors (1).

205030513 is an equidigital number, since it uses as much as digits as its factorization.

205030513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 205030513 is about 14318.8865838095. The cubic root of 205030513 is about 589.6661071625. Note that the first 3 decimals are identical.

The spelling of 205030513 in words is "two hundred five million, thirty thousand, five hundred thirteen".