16703221 has 8 divisors (see below), whose sum is σ = 17835840. Its totient is φ = 15604512.

The previous prime is 16703191. The next prime is 16703237. The reversal of 16703221 is 12230761.

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 16703221 - 2⁹ = 16702709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16703192 and 16703201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16703251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7456 + ... + 9433.

It is an arithmetic number, because the mean of its divisors is an integer number (2229480).

Almost surely, 2^16703221 is an apocalyptic number.

It is an amenable number.

16703221 is a deficient number, since it is larger than the sum of its proper divisors (1132619).

16703221 is a wasteful number, since it uses less digits than its factorization.

16703221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16955.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 16703221 is about 4086.9574257631. The cubic root of 16703221 is about 255.6230873058.

Adding to 16703221 its reverse (12230761), we get a palindrome (28933982).

The spelling of 16703221 in words is "sixteen million, seven hundred three thousand, two hundred twenty-one".