216243552 has 96 divisors (see below), whose sum is σ = 656716032. Its totient is φ = 61023744.

The previous prime is 216243529. The next prime is 216243557. The reversal of 216243552 is 255342612.

216243552 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 (96).

It is a super-2 number, since 2×216243552² = 93522547563153408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216243557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53838 + ... + 57714.

It is an arithmetic number, because the mean of its divisors is an integer number (6840792).

Almost surely, 2^216243552 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 216243552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (328358016).

216243552 is an abundant number, since it is smaller than the sum of its proper divisors (440472480).

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

216243552 is a wasteful number, since it uses less digits than its factorization.

216243552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3980 (or 3972 counting only the distinct ones).

The product of its digits is 14400, while the sum is 30.

The square root of 216243552 is about 14705.2219296412. The cubic root of 216243552 is about 600.2254264054.

The spelling of 216243552 in words is "two hundred sixteen million, two hundred forty-three thousand, five hundred fifty-two".