16222216 has 32 divisors (see below), whose sum is σ = 32552280. Its totient is φ = 7552000.

The previous prime is 16222211. The next prime is 16222259. The reversal of 16222216 is 61222261.

It can be written as a sum of positive squares in 4 ways, for example, as 14853316 + 1368900 = 3854^2 + 1170^2 .

It is not an unprimeable number, because it can be changed into a prime (16222211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13146 + ... + 14326.

Almost surely, 2^16222216 is an apocalyptic number.

It is an amenable number.

16222216 is an abundant number, since it is smaller than the sum of its proper divisors (16330064).

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

16222216 is a wasteful number, since it uses less digits than its factorization.

16222216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1305 (or 1301 counting only the distinct ones).

The product of its digits is 576, while the sum is 22.

The square root of 16222216 is about 4027.6812187660. The cubic root of 16222216 is about 253.1454115735.

Adding to 16222216 its reverse (61222261), we get a palindrome (77444477).

The spelling of 16222216 in words is "sixteen million, two hundred twenty-two thousand, two hundred sixteen".