103205505 has 16 divisors (see below), whose sum is σ = 177831360. Its totient is φ = 50808768.

The previous prime is 103205503. The next prime is 103205563. The reversal of 103205505 is 505502301.

It is not a de Polignac number, because 103205505 - 2¹ = 103205503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (103205503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 264435 + ... + 264824.

It is an arithmetic number, because the mean of its divisors is an integer number (11114460).

Almost surely, 2^103205505 is an apocalyptic number.

103205505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

103205505 is a deficient number, since it is larger than the sum of its proper divisors (74625855).

103205505 is a wasteful number, since it uses less digits than its factorization.

103205505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529280.

The product of its (nonzero) digits is 750, while the sum is 21.

The square root of 103205505 is about 10159.0110247012. The cubic root of 103205505 is about 469.0663599514.

Adding to 103205505 its reverse (505502301), we get a palindrome (608707806).

The spelling of 103205505 in words is "one hundred three million, two hundred five thousand, five hundred five".