216845552 has 60 divisors (see below), whose sum is σ = 527809968. Its totient is φ = 84480000.

The previous prime is 216845543. The next prime is 216845579. The reversal of 216845552 is 255548612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5552 + ... + 21552.

Almost surely, 2^216845552 is an apocalyptic number.

216845552 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216845552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (263904984).

216845552 is an abundant number, since it is smaller than the sum of its proper divisors (310964416).

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

216845552 is a wasteful number, since it uses less digits than its factorization.

216845552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16038 (or 16021 counting only the distinct ones).

The product of its digits is 96000, while the sum is 38.

The square root of 216845552 is about 14725.6766228245. The cubic root of 216845552 is about 600.7818991321.

The spelling of 216845552 in words is "two hundred sixteen million, eight hundred forty-five thousand, five hundred fifty-two".