205520113 has 2 divisors, whose sum is σ = 205520114. Its totient is φ = 205520112.

The previous prime is 205520087. The next prime is 205520137. The reversal of 205520113 is 311025502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192321424 + 13198689 = 13868^2 + 3633^2 .

It is a cyclic number.

It is not a de Polignac number, because 205520113 - 2²⁵ = 171965681 is a prime.

It is not a weakly prime, because it can be changed into another prime (205529113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102760056 + 102760057.

It is an arithmetic number, because the mean of its divisors is an integer number (102760057).

Almost surely, 2^205520113 is an apocalyptic number.

It is an amenable number.

205520113 is a deficient number, since it is larger than the sum of its proper divisors (1).

205520113 is an equidigital number, since it uses as much as digits as its factorization.

205520113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 205520113 is about 14335.9726911012. The cubic root of 205520113 is about 590.1350959431.

Adding to 205520113 its reverse (311025502), we get a palindrome (516545615).

The spelling of 205520113 in words is "two hundred five million, five hundred twenty thousand, one hundred thirteen".