3216332521 has 8 divisors (see below), whose sum is σ = 3436146080. Its totient is φ = 3001572288.

The previous prime is 3216332501. The next prime is 3216332579. The reversal of 3216332521 is 1252336123.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3216332521 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3216332521.

It is not an unprimeable number, because it can be changed into a prime (3216332501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1262016 + ... + 1264561.

It is an arithmetic number, because the mean of its divisors is an integer number (429518260).

Almost surely, 2^3216332521 is an apocalyptic number.

It is an amenable number.

3216332521 is a deficient number, since it is larger than the sum of its proper divisors (219813559).

3216332521 is a wasteful number, since it uses less digits than its factorization.

3216332521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2526663.

The product of its digits is 6480, while the sum is 28.

The square root of 3216332521 is about 56712.7192171210. The cubic root of 3216332521 is about 1476.1154096407.

Adding to 3216332521 its reverse (1252336123), we get a palindrome (4468668644).

The spelling of 3216332521 in words is "three billion, two hundred sixteen million, three hundred thirty-two thousand, five hundred twenty-one".