16100225 has 6 divisors (see below), whose sum is σ = 19964310. Its totient is φ = 12880160.

The previous prime is 16100221. The next prime is 16100243. The reversal of 16100225 is 52200161.

It can be written as a sum of positive squares in 3 ways, for example, as 1385329 + 14714896 = 1177^2 + 3836^2 .

It is not a de Polignac number, because 16100225 - 2² = 16100221 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16100221) 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 5 ways as a sum of consecutive naturals, for example, 321980 + ... + 322029.

It is an arithmetic number, because the mean of its divisors is an integer number (3327385).

Almost surely, 2^16100225 is an apocalyptic number.

It is an amenable number.

16100225 is a deficient number, since it is larger than the sum of its proper divisors (3864085).

16100225 is an equidigital number, since it uses as much as digits as its factorization.

16100225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644019 (or 644014 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 16100225 is about 4012.5085669690. The cubic root of 16100225 is about 252.5092634578.

Adding to 16100225 its reverse (52200161), we get a palindrome (68300386).

The spelling of 16100225 in words is "sixteen million, one hundred thousand, two hundred twenty-five".