216732503 has 4 divisors (see below), whose sum is σ = 233404248. Its totient is φ = 200060760.

The previous prime is 216732499. The next prime is 216732539. The reversal of 216732503 is 305237612.

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 216732503 - 2² = 216732499 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 (216722503) 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, 8335853 + ... + 8335878.

It is an arithmetic number, because the mean of its divisors is an integer number (58351062).

Almost surely, 2^216732503 is an apocalyptic number.

216732503 is a deficient number, since it is larger than the sum of its proper divisors (16671745).

216732503 is a wasteful number, since it uses less digits than its factorization.

216732503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16671744.

The product of its (nonzero) digits is 7560, while the sum is 29.

The square root of 216732503 is about 14721.8376230687. The cubic root of 216732503 is about 600.6774782693.

The spelling of 216732503 in words is "two hundred sixteen million, seven hundred thirty-two thousand, five hundred three".