9216181312 has 56 divisors (see below), whose sum is σ = 19710879552. Its totient is φ = 4250227200.

The previous prime is 9216181309. The next prime is 9216181333. The reversal of 9216181312 is 2131816129.

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, 1253487 + ... + 1260817.

It is an arithmetic number, because the mean of its divisors is an integer number (351979992).

Almost surely, 2^9216181312 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 9216181312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9855439776).

9216181312 is an abundant number, since it is smaller than the sum of its proper divisors (10494698240).

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

9216181312 is a wasteful number, since it uses less digits than its factorization.

9216181312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8867 (or 8857 counting only the distinct ones).

The product of its digits is 5184, while the sum is 34.

The square root of 9216181312 is about 96000.9443286888. The cubic root of 9216181312 is about 2096.6068644628.

The spelling of 9216181312 in words is "nine billion, two hundred sixteen million, one hundred eighty-one thousand, three hundred twelve".