32216321 has 8 divisors (see below), whose sum is σ = 32768064. Its totient is φ = 31667440.

The previous prime is 32216311. The next prime is 32216329. The reversal of 32216321 is 12361223.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 32216321 - 2⁶ = 32216257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 32216293 and 32216302.

It is not an unprimeable number, because it can be changed into a prime (32216329) 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, 41291 + ... + 42063.

It is an arithmetic number, because the mean of its divisors is an integer number (4096008).

Almost surely, 2^32216321 is an apocalyptic number.

It is an amenable number.

32216321 is a deficient number, since it is larger than the sum of its proper divisors (551743).

32216321 is an equidigital number, since it uses as much as digits as its factorization.

32216321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1431.

The product of its digits is 432, while the sum is 20.

The square root of 32216321 is about 5675.9423006229. The cubic root of 32216321 is about 318.1939964442.

Adding to 32216321 its reverse (12361223), we get a palindrome (44577544).

The spelling of 32216321 in words is "thirty-two million, two hundred sixteen thousand, three hundred twenty-one".