205320103 has 4 divisors (see below), whose sum is σ = 214247088. Its totient is φ = 196393120.

The previous prime is 205320079. The next prime is 205320107. The reversal of 205320103 is 301023502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205320103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205320107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4463458 + ... + 4463503.

It is an arithmetic number, because the mean of its divisors is an integer number (53561772).

Almost surely, 2^205320103 is an apocalyptic number.

205320103 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

205320103 is a deficient number, since it is larger than the sum of its proper divisors (8926985).

205320103 is an equidigital number, since it uses as much as digits as its factorization.

205320103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8926984.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 205320103 is about 14328.9951845899. The cubic root of 205320103 is about 589.9435960635.

Adding to 205320103 its reverse (301023502), we get a palindrome (506343605).

The spelling of 205320103 in words is "two hundred five million, three hundred twenty thousand, one hundred three".