16611222 has 16 divisors (see below), whose sum is σ = 33546240. Its totient is φ = 5483112.

The previous prime is 16611181. The next prime is 16611233. The reversal of 16611222 is 22211661.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12822 + ... + 14057.

It is an arithmetic number, because the mean of its divisors is an integer number (2096640).

Almost surely, 2^16611222 is an apocalyptic number.

16611222 is an abundant number, since it is smaller than the sum of its proper divisors (16935018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16611222 is a wasteful number, since it uses less digits than its factorization.

16611222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26987.

The product of its digits is 288, while the sum is 21.

The square root of 16611222 is about 4075.6866906081. The cubic root of 16611222 is about 255.1529109797.

Adding to 16611222 its reverse (22211661), we get a palindrome (38822883).

The spelling of 16611222 in words is "sixteen million, six hundred eleven thousand, two hundred twenty-two".