2218550505503 has 4 divisors (see below), whose sum is σ = 2222996499000. Its totient is φ = 2214104512008.

The previous prime is 2218550505497. The next prime is 2218550505517. The reversal of 2218550505503 is 3055050558122.

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 2218550505503 - 2³² = 2214255538207 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 (2218550535503) 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, 2222996000 + ... + 2222996997.

It is an arithmetic number, because the mean of its divisors is an integer number (555749124750).

Almost surely, 2^{2218550505503} is an apocalyptic number.

2218550505503 is a deficient number, since it is larger than the sum of its proper divisors (4445993497).

2218550505503 is an equidigital number, since it uses as much as digits as its factorization.

2218550505503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4445993496.

The product of its (nonzero) digits is 300000, while the sum is 41.

The spelling of 2218550505503 in words is "two trillion, two hundred eighteen billion, five hundred fifty million, five hundred five thousand, five hundred three".