16875221 has 8 divisors (see below), whose sum is σ = 18837984. Its totient is φ = 14983920.

The previous prime is 16875167. The next prime is 16875233. The reversal of 16875221 is 12257861.

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-16875221 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16875241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17366 + ... + 18311.

It is an arithmetic number, because the mean of its divisors is an integer number (2354748).

Almost surely, 2^16875221 is an apocalyptic number.

16875221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16875221 is a deficient number, since it is larger than the sum of its proper divisors (1962763).

16875221 is a wasteful number, since it uses less digits than its factorization.

16875221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35731.

The product of its digits is 6720, while the sum is 32.

The square root of 16875221 is about 4107.9460804641. The cubic root of 16875221 is about 256.4975117142.

The spelling of 16875221 in words is "sixteen million, eight hundred seventy-five thousand, two hundred twenty-one".