15912216 has 48 divisors (see below), whose sum is σ = 43814160. Its totient is φ = 5215680.

The previous prime is 15912209. The next prime is 15912227. The reversal of 15912216 is 61221951.

15912216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 15912216.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2581 + ... + 6203.

It is an arithmetic number, because the mean of its divisors is an integer number (912795).

Almost surely, 2^15912216 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 15912216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21907080).

15912216 is an abundant number, since it is smaller than the sum of its proper divisors (27901944).

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

15912216 is a wasteful number, since it uses less digits than its factorization.

15912216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3696 (or 3689 counting only the distinct ones).

The product of its digits is 1080, while the sum is 27.

The square root of 15912216 is about 3989.0119077285. The cubic root of 15912216 is about 251.5225274837.

The spelling of 15912216 in words is "fifteen million, nine hundred twelve thousand, two hundred sixteen".