205113103 has 12 divisors (see below), whose sum is σ = 231765840. Its totient is φ = 181099776.

The previous prime is 205113101. The next prime is 205113131. The reversal of 205113103 is 301311502.

It is not a de Polignac number, because 205113103 - 2¹ = 205113101 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205113101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22498 + ... + 30271.

It is an arithmetic number, because the mean of its divisors is an integer number (19313820).

Almost surely, 2^205113103 is an apocalyptic number.

205113103 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

205113103 is a deficient number, since it is larger than the sum of its proper divisors (26652737).

205113103 is a wasteful number, since it uses less digits than its factorization.

205113103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52818 (or 52805 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 205113103 is about 14321.7702467258. The cubic root of 205113103 is about 589.7452725924.

Adding to 205113103 its reverse (301311502), we get a palindrome (506424605).

The spelling of 205113103 in words is "two hundred five million, one hundred thirteen thousand, one hundred three".