215300916 has 72 divisors (see below), whose sum is σ = 566879040. Its totient is φ = 71451072.

The previous prime is 215300873. The next prime is 215300929. The reversal of 215300916 is 619003512.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 215300916.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 348640 + ... + 349256.

It is an arithmetic number, because the mean of its divisors is an integer number (7873320).

Almost surely, 2^215300916 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 215300916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (283439520).

215300916 is an abundant number, since it is smaller than the sum of its proper divisors (351578124).

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

215300916 is a wasteful number, since it uses less digits than its factorization.

215300916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 995 (or 981 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 215300916 is about 14673.1358611580. The cubic root of 215300916 is about 599.3520004128.

The spelling of 215300916 in words is "two hundred fifteen million, three hundred thousand, nine hundred sixteen".