16652321 has 8 divisors (see below), whose sum is σ = 19070400. Its totient is φ = 14244048.

The previous prime is 16652291. The next prime is 16652323. The reversal of 16652321 is 12325661.

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

It is not a de Polignac number, because 16652321 - 2¹⁸ = 16390177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16652323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1655 + ... + 6003.

It is an arithmetic number, because the mean of its divisors is an integer number (2383800).

Almost surely, 2^16652321 is an apocalyptic number.

It is an amenable number.

16652321 is a deficient number, since it is larger than the sum of its proper divisors (2418079).

16652321 is an equidigital number, since it uses as much as digits as its factorization.

16652321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4903.

The product of its digits is 2160, while the sum is 26.

The square root of 16652321 is about 4080.7255482328. The cubic root of 16652321 is about 255.3631682959.

Adding to 16652321 its reverse (12325661), we get a palindrome (28977982).

The spelling of 16652321 in words is "sixteen million, six hundred fifty-two thousand, three hundred twenty-one".