3216720100 has 72 divisors (see below), whose sum is σ = 7626886848. Its totient is φ = 1167868800.

The previous prime is 3216720011. The next prime is 3216720119. The reversal of 3216720100 is 10276123.

It is a Harshad number since it is a multiple of its sum of digits (22).

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, 830769 + ... + 834631.

It is an arithmetic number, because the mean of its divisors is an integer number (105928984).

Almost surely, 2^3216720100 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 3216720100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3813443424).

3216720100 is an abundant number, since it is smaller than the sum of its proper divisors (4410166748).

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

3216720100 is a wasteful number, since it uses less digits than its factorization.

3216720100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4645 (or 4638 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 3216720100 is about 56716.1361518924. The cubic root of 3216720100 is about 1476.1746995671.

Adding to 3216720100 its reverse (10276123), we get a palindrome (3226996223).

The spelling of 3216720100 in words is "three billion, two hundred sixteen million, seven hundred twenty thousand, one hundred".