216365056 has 48 divisors (see below), whose sum is σ = 447665400. Its totient is φ = 104423424.

The previous prime is 216365003. The next prime is 216365087. The reversal of 216365056 is 650563612.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57571 + ... + 61213.

Almost surely, 2^216365056 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 216365056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223832700).

216365056 is an abundant number, since it is smaller than the sum of its proper divisors (231300344).

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

216365056 is an equidigital number, since it uses as much as digits as its factorization.

216365056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3694 (or 3674 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 216365056 is about 14709.3526710049. The cubic root of 216365056 is about 600.3378245700.

The spelling of 216365056 in words is "two hundred sixteen million, three hundred sixty-five thousand, fifty-six".