205125103 has 2 divisors, whose sum is σ = 205125104. Its totient is φ = 205125102.

The previous prime is 205125101. The next prime is 205125113. The reversal of 205125103 is 301521502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205125103 - 2¹ = 205125101 is a prime.

Together with 205125101, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205125101) 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, 102562551 + 102562552.

It is an arithmetic number, because the mean of its divisors is an integer number (102562552).

Almost surely, 2^205125103 is an apocalyptic number.

205125103 is a deficient number, since it is larger than the sum of its proper divisors (1).

205125103 is an equidigital number, since it uses as much as digits as its factorization.

205125103 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 205125103 is about 14322.1891832220. The cubic root of 205125103 is about 589.7567732476.

Adding to 205125103 its reverse (301521502), we get a palindrome (506646605).

The spelling of 205125103 in words is "two hundred five million, one hundred twenty-five thousand, one hundred three".