205025101 has 2 divisors, whose sum is σ = 205025102. Its totient is φ = 205025100.

The previous prime is 205025089. The next prime is 205025111. The reversal of 205025101 is 101520502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204776100 + 249001 = 14310^2 + 499^2 .

It is a cyclic number.

It is not a de Polignac number, because 205025101 - 2²³ = 196636493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205025111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102512550 + 102512551.

It is an arithmetic number, because the mean of its divisors is an integer number (102512551).

Almost surely, 2^205025101 is an apocalyptic number.

It is an amenable number.

205025101 is a deficient number, since it is larger than the sum of its proper divisors (1).

205025101 is an equidigital number, since it uses as much as digits as its factorization.

205025101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 205025101 is about 14318.6976013882. The cubic root of 205025101 is about 589.6609188273.

Adding to 205025101 its reverse (101520502), we get a palindrome (306545603).

The spelling of 205025101 in words is "two hundred five million, twenty-five thousand, one hundred one".