205103 has 2 divisors, whose sum is σ = 205104. Its totient is φ = 205102.

The previous prime is 205097. The next prime is 205111. The reversal of 205103 is 301502.

205103 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205103 - 2¹² = 201007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102551 + 102552.

It is an arithmetic number, because the mean of its divisors is an integer number (102552).

2²⁰⁵¹⁰³ is an apocalyptic number.

205103 is a deficient number, since it is larger than the sum of its proper divisors (1).

205103 is an equidigital number, since it uses as much as digits as its factorization.

205103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30, while the sum is 11.

The square root of 205103 is about 452.8829870949. The cubic root of 205103 is about 58.9735589651.

Adding to 205103 its reverse (301502), we get a palindrome (506605).

It can be divided in two parts, 205 and 103, that multiplied together give a triangular number (21115 = T₂₀₅).

The spelling of 205103 in words is "two hundred five thousand, one hundred three".