16559225 has 6 divisors (see below), whose sum is σ = 20533470. Its totient is φ = 13247360.

The previous prime is 16559201. The next prime is 16559227. The reversal of 16559225 is 52295561.

It can be written as a sum of positive squares in 3 ways, for example, as 4910656 + 11648569 = 2216^2 + 3413^2 .

It is not a de Polignac number, because 16559225 - 2¹⁸ = 16297081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16559227) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 331160 + ... + 331209.

It is an arithmetic number, because the mean of its divisors is an integer number (3422245).

Almost surely, 2^16559225 is an apocalyptic number.

It is an amenable number.

16559225 is a deficient number, since it is larger than the sum of its proper divisors (3974245).

16559225 is an equidigital number, since it uses as much as digits as its factorization.

16559225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662379 (or 662374 counting only the distinct ones).

The product of its digits is 27000, while the sum is 35.

The square root of 16559225 is about 4069.3027658310. The cubic root of 16559225 is about 254.8864033308.

The spelling of 16559225 in words is "sixteen million, five hundred fifty-nine thousand, two hundred twenty-five".