216242488 has 144 divisors (see below), whose sum is σ = 534915360. Its totient is φ = 81607680.

The previous prime is 216242461. The next prime is 216242489. The reversal of 216242488 is 884242612.

216242488 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216242489) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2229256 + ... + 2229352.

It is an arithmetic number, because the mean of its divisors is an integer number (3714690).

Almost surely, 2^216242488 is an apocalyptic number.

216242488 is a gapful number since it is divisible by the number (28) 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 216242488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267457680).

216242488 is an abundant number, since it is smaller than the sum of its proper divisors (318672872).

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

216242488 is a wasteful number, since it uses less digits than its factorization.

216242488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186 (or 164 counting only the distinct ones).

The product of its digits is 49152, while the sum is 37.

The square root of 216242488 is about 14705.1857519720. The cubic root of 216242488 is about 600.2244419585.

The spelling of 216242488 in words is "two hundred sixteen million, two hundred forty-two thousand, four hundred eighty-eight".