16653222 has 32 divisors (see below), whose sum is σ = 37641600. Its totient is φ = 5455944.

The previous prime is 16653211. The next prime is 16653227. The reversal of 16653222 is 22235661.

16653222 is a `hidden beast` number, since 1 + 6 + 653 + 2 + 2 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16653227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 573 + ... + 5799.

It is an arithmetic number, because the mean of its divisors is an integer number (1176300).

Almost surely, 2^16653222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16653222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18820800).

16653222 is an abundant number, since it is smaller than the sum of its proper divisors (20988378).

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

16653222 is a wasteful number, since it uses less digits than its factorization.

16653222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5297 (or 5291 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 16653222 is about 4080.8359437743. The cubic root of 16653222 is about 255.3677738214.

Adding to 16653222 its reverse (22235661), we get a palindrome (38888883).

The spelling of 16653222 in words is "sixteen million, six hundred fifty-three thousand, two hundred twenty-two".