16216320 has 144 divisors (see below), whose sum is σ = 53569152. Its totient is φ = 4177920.

The previous prime is 16216303. The next prime is 16216331. The reversal of 16216320 is 2361261.

It is a happy number.

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157389 + ... + 157491.

It is an arithmetic number, because the mean of its divisors is an integer number (372008).

Almost surely, 2^16216320 is an apocalyptic number.

16216320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16216320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26784576).

16216320 is an abundant number, since it is smaller than the sum of its proper divisors (37352832).

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

16216320 is a wasteful number, since it uses less digits than its factorization.

16216320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 16216320 is about 4026.9492174598. The cubic root of 16216320 is about 253.1147391055.

Adding to 16216320 its reverse (2361261), we get a palindrome (18577581).

The spelling of 16216320 in words is "sixteen million, two hundred sixteen thousand, three hundred twenty".