16216325 has 6 divisors (see below), whose sum is σ = 20108274. Its totient is φ = 12973040.

The previous prime is 16216303. The next prime is 16216331. The reversal of 16216325 is 52361261.

It can be written as a sum of positive squares in 3 ways, for example, as 4669921 + 11546404 = 2161^2 + 3398^2 .

It is not a de Polignac number, because 16216325 - 2⁶ = 16216261 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16216294 and 16216303.

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 in 5 ways as a sum of consecutive naturals, for example, 324302 + ... + 324351.

It is an arithmetic number, because the mean of its divisors is an integer number (3351379).

Almost surely, 2^16216325 is an apocalyptic number.

It is an amenable number.

16216325 is a deficient number, since it is larger than the sum of its proper divisors (3891949).

16216325 is an equidigital number, since it uses as much as digits as its factorization.

16216325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648663 (or 648658 counting only the distinct ones).

The product of its digits is 2160, while the sum is 26.

The square root of 16216325 is about 4026.9498382771. The cubic root of 16216325 is about 253.1147651199.

Adding to 16216325 its reverse (52361261), we get a palindrome (68577586).

The spelling of 16216325 in words is "sixteen million, two hundred sixteen thousand, three hundred twenty-five".