216541503 has 12 divisors (see below), whose sum is σ = 313948440. Its totient is φ = 143822736.

The previous prime is 216541489. The next prime is 216541511. The reversal of 216541503 is 305145612.

216541503 is a `hidden beast` number, since 2 + 1 + 654 + 1 + 5 + 0 + 3 = 666.

It is not a de Polignac number, because 216541503 - 2⁴ = 216541487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216541513) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42301 + ... + 47142.

It is an arithmetic number, because the mean of its divisors is an integer number (26162370).

Almost surely, 2^216541503 is an apocalyptic number.

216541503 is a deficient number, since it is larger than the sum of its proper divisors (97406937).

216541503 is a wasteful number, since it uses less digits than its factorization.

216541503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89718 (or 89715 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 216541503 is about 14715.3492313298. The cubic root of 216541503 is about 600.5009732599.

The spelling of 216541503 in words is "two hundred sixteen million, five hundred forty-one thousand, five hundred three".