216943572 has 48 divisors (see below), whose sum is σ = 519411200. Its totient is φ = 70450560.

The previous prime is 216943541. The next prime is 216943589. The reversal of 216943572 is 275349612.

216943572 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 216943572.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78429 + ... + 81147.

Almost surely, 2^216943572 is an apocalyptic number.

It is an amenable number.

216943572 is an abundant number, since it is smaller than the sum of its proper divisors (302467628).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216943572 is a wasteful number, since it uses less digits than its factorization.

216943572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2896 (or 2894 counting only the distinct ones).

The product of its digits is 90720, while the sum is 39.

The square root of 216943572 is about 14729.0044470086. The cubic root of 216943572 is about 600.8724086682.

The spelling of 216943572 in words is "two hundred sixteen million, nine hundred forty-three thousand, five hundred seventy-two".