16372225 has 6 divisors (see below), whose sum is σ = 20301590. Its totient is φ = 13097760.

The previous prime is 16372219. The next prime is 16372229. The reversal of 16372225 is 52227361.

It can be written as a sum of positive squares in 3 ways, for example, as 5035536 + 11336689 = 2244^2 + 3367^2 .

It is not a de Polignac number, because 16372225 - 2⁹ = 16371713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16372193 and 16372202.

It is not an unprimeable number, because it can be changed into a prime (16372229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 327420 + ... + 327469.

Almost surely, 2^16372225 is an apocalyptic number.

It is an amenable number.

16372225 is a deficient number, since it is larger than the sum of its proper divisors (3929365).

16372225 is an equidigital number, since it uses as much as digits as its factorization.

16372225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654899 (or 654894 counting only the distinct ones).

The product of its digits is 5040, while the sum is 28.

The square root of 16372225 is about 4046.2606193867. The cubic root of 16372225 is about 253.9233085265.

Adding to 16372225 its reverse (52227361), we get a palindrome (68599586).

The spelling of 16372225 in words is "sixteen million, three hundred seventy-two thousand, two hundred twenty-five".