3216532220 has 48 divisors (see below), whose sum is σ = 7391212416. Its totient is φ = 1166088000.

The previous prime is 3216532177. The next prime is 3216532223. The reversal of 3216532220 is 222356123.

It is a self number, because there is not a number n which added to its sum of digits gives 3216532220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3216532223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50735 + ... + 94905.

It is an arithmetic number, because the mean of its divisors is an integer number (153983592).

Almost surely, 2^3216532220 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 3216532220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3695606208).

3216532220 is an abundant number, since it is smaller than the sum of its proper divisors (4174680196).

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

3216532220 is a wasteful number, since it uses less digits than its factorization.

3216532220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44522 (or 44520 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 3216532220 is about 56714.4798089518. The cubic root of 3216532220 is about 1476.1459592049.

Adding to 3216532220 its reverse (222356123), we get a palindrome (3438888343).

The spelling of 3216532220 in words is "three billion, two hundred sixteen million, five hundred thirty-two thousand, two hundred twenty".