216715072 has 56 divisors (see below), whose sum is σ = 496645184. Its totient is φ = 91901952.

The previous prime is 216715069. The next prime is 216715097. The reversal of 216715072 is 270517612.

216715072 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 (56).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40963 + ... + 45949.

It is an arithmetic number, because the mean of its divisors is an integer number (8868664).

Almost surely, 2^216715072 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 216715072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248322592).

216715072 is an abundant number, since it is smaller than the sum of its proper divisors (279930112).

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

216715072 is an equidigital number, since it uses as much as digits as its factorization.

216715072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5103 (or 5093 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 216715072 is about 14721.2455994729. The cubic root of 216715072 is about 600.6613744090.

The spelling of 216715072 in words is "two hundred sixteen million, seven hundred fifteen thousand, seventy-two".