216342528 has 56 divisors (see below), whose sum is σ = 576943728. Its totient is φ = 72105984.

The previous prime is 216342509. The next prime is 216342541. The reversal of 216342528 is 825243612.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20175 + ... + 28977.

Almost surely, 2^216342528 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 216342528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288471864).

216342528 is an abundant number, since it is smaller than the sum of its proper divisors (360601200).

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

216342528 is an frugal number, since it uses more digits than its factorization.

216342528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8832 (or 8808 counting only the distinct ones).

The product of its digits is 23040, while the sum is 33.

The square root of 216342528 is about 14708.5868797788. The cubic root of 216342528 is about 600.3169880570.

The spelling of 216342528 in words is "two hundred sixteen million, three hundred forty-two thousand, five hundred twenty-eight".