216807503 has 8 divisors (see below), whose sum is σ = 236741376. Its totient is φ = 196911000.

The previous prime is 216807427. The next prime is 216807523. The reversal of 216807503 is 305708612.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 216807503 - 2¹⁰ = 216806479 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216807503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216807523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3578 + ... + 21128.

It is an arithmetic number, because the mean of its divisors is an integer number (29592672).

Almost surely, 2^216807503 is an apocalyptic number.

216807503 is a deficient number, since it is larger than the sum of its proper divisors (19933873).

216807503 is a wasteful number, since it uses less digits than its factorization.

216807503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18685.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 216807503 is about 14724.3846390944. The cubic root of 216807503 is about 600.7467581645.

The spelling of 216807503 in words is "two hundred sixteen million, eight hundred seven thousand, five hundred three".