16213222 has 4 divisors (see below), whose sum is σ = 24319836. Its totient is φ = 8106610.

The previous prime is 16213207. The next prime is 16213247. The reversal of 16213222 is 22231261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22231261 = 13 ⋅1710097.

It is a self number, because there is not a number n which added to its sum of digits gives 16213222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4053304 + ... + 4053307.

It is an arithmetic number, because the mean of its divisors is an integer number (6079959).

Almost surely, 2^16213222 is an apocalyptic number.

16213222 is a deficient number, since it is larger than the sum of its proper divisors (8106614).

16213222 is an equidigital number, since it uses as much as digits as its factorization.

16213222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8106613.

The product of its digits is 288, while the sum is 19.

The square root of 16213222 is about 4026.5645406475. The cubic root of 16213222 is about 253.0986195543.

Adding to 16213222 its reverse (22231261), we get a palindrome (38444483).

The spelling of 16213222 in words is "sixteen million, two hundred thirteen thousand, two hundred twenty-two".