16225566 has 48 divisors (see below), whose sum is σ = 38071440. Its totient is φ = 4596480.

The previous prime is 16225543. The next prime is 16225571. The reversal of 16225566 is 66552261.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67206 + ... + 67446.

It is an arithmetic number, because the mean of its divisors is an integer number (793155).

Almost surely, 2^16225566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16225566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19035720).

16225566 is an abundant number, since it is smaller than the sum of its proper divisors (21845874).

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

16225566 is a wasteful number, since it uses less digits than its factorization.

16225566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489 (or 482 counting only the distinct ones).

The product of its digits is 21600, while the sum is 33.

The square root of 16225566 is about 4028.0970693368. The cubic root of 16225566 is about 253.1628358013.

The spelling of 16225566 in words is "sixteen million, two hundred twenty-five thousand, five hundred sixty-six".