72217271503 has 4 divisors (see below), whose sum is σ = 77772446248. Its totient is φ = 66662096760.

The previous prime is 72217271479. The next prime is 72217271519. The reversal of 72217271503 is 30517271227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30517271227 = 10177 ⋅2998651.

It is a cyclic number.

It is not a de Polignac number, because 72217271503 - 2⁵ = 72217271471 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 (72217271593) 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, 2777587353 + ... + 2777587378.

It is an arithmetic number, because the mean of its divisors is an integer number (19443111562).

Almost surely, 2^72217271503 is an apocalyptic number.

72217271503 is a deficient number, since it is larger than the sum of its proper divisors (5555174745).

72217271503 is a wasteful number, since it uses less digits than its factorization.

72217271503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5555174744.

The product of its (nonzero) digits is 41160, while the sum is 37.

The spelling of 72217271503 in words is "seventy-two billion, two hundred seventeen million, two hundred seventy-one thousand, five hundred three".