216503272 has 32 divisors (see below), whose sum is σ = 410417280. Its totient is φ = 107066560.

The previous prime is 216503249. The next prime is 216503281. The reversal of 216503272 is 272305612.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 216503272.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 430173 + ... + 430675.

It is an arithmetic number, because the mean of its divisors is an integer number (12825540).

Almost surely, 2^216503272 is an apocalyptic number.

It is an amenable number.

216503272 is a deficient number, since it is larger than the sum of its proper divisors (193914008).

216503272 is a wasteful number, since it uses less digits than its factorization.

216503272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993 (or 989 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 216503272 is about 14714.0501562282. The cubic root of 216503272 is about 600.4656311452.

Adding to 216503272 its reverse (272305612), we get a palindrome (488808884).

The spelling of 216503272 in words is "two hundred sixteen million, five hundred three thousand, two hundred seventy-two".