216632272 has 20 divisors (see below), whose sum is σ = 419994820. Its totient is φ = 108246528.

The previous prime is 216632263. The next prime is 216632329. The reversal of 216632272 is 272236612.

216632272 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 119333776 + 97298496 = 10924^2 + 9864^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29128 + ... + 35800.

It is an arithmetic number, because the mean of its divisors is an integer number (20999741).

Almost surely, 2^216632272 is an apocalyptic number.

It is an amenable number.

216632272 is a deficient number, since it is larger than the sum of its proper divisors (203362548).

216632272 is a wasteful number, since it uses less digits than its factorization.

216632272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8710 (or 8704 counting only the distinct ones).

The product of its digits is 12096, while the sum is 31.

The square root of 216632272 is about 14718.4330687747. The cubic root of 216632272 is about 600.5848667366.

Adding to 216632272 its reverse (272236612), we get a palindrome (488868884).

The spelling of 216632272 in words is "two hundred sixteen million, six hundred thirty-two thousand, two hundred seventy-two".