16225556 has 6 divisors (see below), whose sum is σ = 28394730. Its totient is φ = 8112776.

The previous prime is 16225543. The next prime is 16225571. The reversal of 16225556 is 65552261.

It can be written as a sum of positive squares in only one way, i.e., 10627600 + 5597956 = 3260^2 + 2366^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2028191 + ... + 2028198.

It is an arithmetic number, because the mean of its divisors is an integer number (4732455).

Almost surely, 2^16225556 is an apocalyptic number.

It is an amenable number.

16225556 is a deficient number, since it is larger than the sum of its proper divisors (12169174).

16225556 is a wasteful number, since it uses less digits than its factorization.

16225556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4056393 (or 4056391 counting only the distinct ones).

The product of its digits is 18000, while the sum is 32.

The square root of 16225556 is about 4028.0958280557. The cubic root of 16225556 is about 253.1627837923.

The spelling of 16225556 in words is "sixteen million, two hundred twenty-five thousand, five hundred fifty-six".