505500203 has 4 divisors (see below), whose sum is σ = 544384848. Its totient is φ = 466615560.

The previous prime is 505500197. The next prime is 505500211. The reversal of 505500203 is 302005505.

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

It is a cyclic number.

It is not a de Polignac number, because 505500203 - 2¹⁰ = 505499179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505500283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19442303 + ... + 19442328.

It is an arithmetic number, because the mean of its divisors is an integer number (136096212).

Almost surely, 2^505500203 is an apocalyptic number.

505500203 is a deficient number, since it is larger than the sum of its proper divisors (38884645).

505500203 is a wasteful number, since it uses less digits than its factorization.

505500203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38884644.

The product of its (nonzero) digits is 750, while the sum is 20.

The square root of 505500203 is about 22483.3316703731. The cubic root of 505500203 is about 796.6002617534.

Adding to 505500203 its reverse (302005505), we get a palindrome (807505708).

The spelling of 505500203 in words is "five hundred five million, five hundred thousand, two hundred three".