16722205 has 4 divisors (see below), whose sum is σ = 20066652. Its totient is φ = 13377760.

The previous prime is 16722191. The next prime is 16722229. The reversal of 16722205 is 50222761.

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 11978521 + 4743684 = 3461^2 + 2178^2 .

It is not a de Polignac number, because 16722205 - 2⁷ = 16722077 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16722205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1672216 + ... + 1672225.

It is an arithmetic number, because the mean of its divisors is an integer number (5016663).

Almost surely, 2^16722205 is an apocalyptic number.

It is an amenable number.

16722205 is a deficient number, since it is larger than the sum of its proper divisors (3344447).

16722205 is an equidigital number, since it uses as much as digits as its factorization.

16722205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3344446.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 16722205 is about 4089.2792763518. The cubic root of 16722205 is about 255.7198932131.

Adding to 16722205 its reverse (50222761), we get a palindrome (66944966).

The spelling of 16722205 in words is "sixteen million, seven hundred twenty-two thousand, two hundred five".