16220173 has 4 divisors (see below), whose sum is σ = 16526268. Its totient is φ = 15914080.

The previous prime is 16220143. The next prime is 16220177. The reversal of 16220173 is 37102261.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8892324 + 7327849 = 2982^2 + 2707^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16220173 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16220177) 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 3 ways as a sum of consecutive naturals, for example, 152968 + ... + 153073.

It is an arithmetic number, because the mean of its divisors is an integer number (4131567).

Almost surely, 2^16220173 is an apocalyptic number.

It is an amenable number.

16220173 is a deficient number, since it is larger than the sum of its proper divisors (306095).

16220173 is an equidigital number, since it uses as much as digits as its factorization.

16220173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306094.

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

The square root of 16220173 is about 4027.4275909071. The cubic root of 16220173 is about 253.1347842176.

The spelling of 16220173 in words is "sixteen million, two hundred twenty thousand, one hundred seventy-three".