215151216 has 80 divisors (see below), whose sum is σ = 636864000. Its totient is φ = 61311744.

The previous prime is 215151187. The next prime is 215151227. The reversal of 215151216 is 612151512.

215151216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200730 + ... + 201798.

It is an arithmetic number, because the mean of its divisors is an integer number (7960800).

Almost surely, 2^215151216 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 215151216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318432000).

215151216 is an abundant number, since it is smaller than the sum of its proper divisors (421712784).

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

215151216 is a wasteful number, since it uses less digits than its factorization.

215151216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1686 (or 1680 counting only the distinct ones).

The product of its digits is 600, while the sum is 24.

The square root of 215151216 is about 14668.0338150687. The cubic root of 215151216 is about 599.2130572085.

The spelling of 215151216 in words is "two hundred fifteen million, one hundred fifty-one thousand, two hundred sixteen".