503005505503 has 4 divisors (see below), whose sum is σ = 503050592880. Its totient is φ = 502960418128.

The previous prime is 503005505489. The next prime is 503005505603. The reversal of 503005505503 is 305505500305.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 305505500305 = 5 ⋅61101100061.

It is a cyclic number.

It is not a de Polignac number, because 503005505503 - 2²¹ = 503003408351 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 (503005505003) 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, 22526950 + ... + 22549267.

It is an arithmetic number, because the mean of its divisors is an integer number (125762648220).

Almost surely, 2^503005505503 is an apocalyptic number.

503005505503 is a deficient number, since it is larger than the sum of its proper divisors (45087377).

503005505503 is a wasteful number, since it uses less digits than its factorization.

503005505503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45087376.

The product of its (nonzero) digits is 28125, while the sum is 31.

The spelling of 503005505503 in words is "five hundred three billion, five million, five hundred five thousand, five hundred three".