16983221 has 8 divisors (see below), whose sum is σ = 18040320. Its totient is φ = 15932608.

The previous prime is 16983167. The next prime is 16983229. The reversal of 16983221 is 12238961.

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 16983221 - 2⁶ = 16983157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16983229) 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, 4460 + ... + 7338.

It is an arithmetic number, because the mean of its divisors is an integer number (2255040).

Almost surely, 2^16983221 is an apocalyptic number.

It is an amenable number.

16983221 is a deficient number, since it is larger than the sum of its proper divisors (1057099).

16983221 is a wasteful number, since it uses less digits than its factorization.

16983221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3243.

The product of its digits is 5184, while the sum is 32.

The square root of 16983221 is about 4121.0703706683. The cubic root of 16983221 is about 257.0435360544.

The spelling of 16983221 in words is "sixteen million, nine hundred eighty-three thousand, two hundred twenty-one".