3216131216 has 80 divisors (see below), whose sum is σ = 6939258240. Its totient is φ = 1437004800.

The previous prime is 3216131209. The next prime is 3216131221. The reversal of 3216131216 is 6121316123.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 507266 + ... + 513566.

It is an arithmetic number, because the mean of its divisors is an integer number (86740728).

Almost surely, 2^3216131216 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 3216131216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3469629120).

3216131216 is an abundant number, since it is smaller than the sum of its proper divisors (3723127024).

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

3216131216 is a wasteful number, since it uses less digits than its factorization.

3216131216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6424 (or 6418 counting only the distinct ones).

The product of its digits is 1296, while the sum is 26.

The square root of 3216131216 is about 56710.9444111099. The cubic root of 3216131216 is about 1476.0846131139.

Adding to 3216131216 its reverse (6121316123), we get a palindrome (9337447339).

The spelling of 3216131216 in words is "three billion, two hundred sixteen million, one hundred thirty-one thousand, two hundred sixteen".