16225216 has 28 divisors (see below), whose sum is σ = 36797488. Its totient is φ = 6953472.

The previous prime is 16225213. The next prime is 16225241. The reversal of 16225216 is 61252261.

It is a tau number, because it is divible by the number of its divisors (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16225213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17661 + ... + 18556.

It is an arithmetic number, because the mean of its divisors is an integer number (1314196).

Almost surely, 2^16225216 is an apocalyptic number.

16225216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16225216 is an abundant number, since it is smaller than the sum of its proper divisors (20572272).

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

16225216 is an equidigital number, since it uses as much as digits as its factorization.

16225216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36236 (or 36226 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 16225216 is about 4028.0536242707. The cubic root of 16225216 is about 253.1610154718.

Adding to 16225216 its reverse (61252261), we get a palindrome (77477477).

The spelling of 16225216 in words is "sixteen million, two hundred twenty-five thousand, two hundred sixteen".