215303328 has 72 divisors (see below), whose sum is σ = 619714368. Its totient is φ = 70895232.

The previous prime is 215303323. The next prime is 215303329. The reversal of 215303328 is 823303512.

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (215303321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19401 + ... + 28407.

It is an arithmetic number, because the mean of its divisors is an integer number (8607144).

Almost surely, 2^215303328 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 215303328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309857184).

215303328 is an abundant number, since it is smaller than the sum of its proper divisors (404411040).

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

215303328 is a wasteful number, since it uses less digits than its factorization.

215303328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9106 (or 9095 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 215303328 is about 14673.2180519476. The cubic root of 215303328 is about 599.3542385696.

The spelling of 215303328 in words is "two hundred fifteen million, three hundred three thousand, three hundred twenty-eight".