205620113 has 2 divisors, whose sum is σ = 205620114. Its totient is φ = 205620112.

The previous prime is 205620101. The next prime is 205620127. The reversal of 205620113 is 311026502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204833344 + 786769 = 14312^2 + 887^2 .

It is a cyclic number.

It is not a de Polignac number, because 205620113 - 2⁴ = 205620097 is a prime.

It is not a weakly prime, because it can be changed into another prime (205620193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102810056 + 102810057.

It is an arithmetic number, because the mean of its divisors is an integer number (102810057).

Almost surely, 2^205620113 is an apocalyptic number.

It is an amenable number.

205620113 is a deficient number, since it is larger than the sum of its proper divisors (1).

205620113 is an equidigital number, since it uses as much as digits as its factorization.

205620113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 205620113 is about 14339.4599968060. The cubic root of 205620113 is about 590.2307945099.

Adding to 205620113 its reverse (311026502), we get a palindrome (516646615).

The spelling of 205620113 in words is "two hundred five million, six hundred twenty thousand, one hundred thirteen".