9561216 has 64 divisors (see below), whose sum is σ = 29033280. Its totient is φ = 2731008.

The previous prime is 9561203. The next prime is 9561221. The reversal of 9561216 is 6121659.

It is a tau number, because it is divible by the number of its divisors (64).

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, 910 + ... + 4466.

It is an arithmetic number, because the mean of its divisors is an integer number (453645).

Almost surely, 2^9561216 is an apocalyptic number.

9561216 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9561216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14516640).

9561216 is an abundant number, since it is smaller than the sum of its proper divisors (19472064).

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

9561216 is a wasteful number, since it uses less digits than its factorization.

9561216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3581 (or 3569 counting only the distinct ones).

The product of its digits is 3240, while the sum is 30.

The square root of 9561216 is about 3092.1216017485. The cubic root of 9561216 is about 212.2451181659.

The spelling of 9561216 in words is "nine million, five hundred sixty-one thousand, two hundred sixteen".