216382656 has 112 divisors (see below), whose sum is σ = 659831040. Its totient is φ = 61301760.

The previous prime is 216382637. The next prime is 216382669. The reversal of 216382656 is 656283612.

216382656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-2 number, since 2×216382656² = 93642907635228672, which contains 22 as substring.

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, 175450 + ... + 176678.

Almost surely, 2^216382656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216382656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (329915520).

216382656 is an abundant number, since it is smaller than the sum of its proper divisors (443448384).

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

216382656 is a wasteful number, since it uses less digits than its factorization.

216382656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1382 (or 1372 counting only the distinct ones).

The product of its digits is 103680, while the sum is 39.

The square root of 216382656 is about 14709.9509176611. The cubic root of 216382656 is about 600.3541020895.

The spelling of 216382656 in words is "two hundred sixteen million, three hundred eighty-two thousand, six hundred fifty-six".