216995472 has 60 divisors (see below), whose sum is σ = 608355904. Its totient is φ = 72204480.

The previous prime is 216995459. The next prime is 216995477. The reversal of 216995472 is 274599612.

216995472 is a `hidden beast` number, since 2 + 16 + 99 + 547 + 2 = 666.

216995472 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (216995477) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117597 + ... + 119427.

Almost surely, 2^216995472 is an apocalyptic number.

It is an amenable number.

216995472 is an abundant number, since it is smaller than the sum of its proper divisors (391360432).

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

216995472 is a wasteful number, since it uses less digits than its factorization.

216995472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2668 (or 2659 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 216995472 is about 14730.7661715201. The cubic root of 216995472 is about 600.9203209605.

The spelling of 216995472 in words is "two hundred sixteen million, nine hundred ninety-five thousand, four hundred seventy-two".