16216925 has 6 divisors (see below), whose sum is σ = 20109018. Its totient is φ = 12973520.

The previous prime is 16216913. The next prime is 16216931. The reversal of 16216925 is 52961261.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 196 + 16216729 = 14^2 + 4027^2 .

It is not a de Polignac number, because 16216925 - 2¹² = 16212829 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16216891 and 16216900.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 324314 + ... + 324363.

It is an arithmetic number, because the mean of its divisors is an integer number (3351503).

Almost surely, 2^16216925 is an apocalyptic number.

It is an amenable number.

16216925 is a deficient number, since it is larger than the sum of its proper divisors (3892093).

16216925 is an equidigital number, since it uses as much as digits as its factorization.

16216925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648687 (or 648682 counting only the distinct ones).

The product of its digits is 6480, while the sum is 32.

The square root of 16216925 is about 4027.0243356603. The cubic root of 16216925 is about 253.1178868092.

The spelling of 16216925 in words is "sixteen million, two hundred sixteen thousand, nine hundred twenty-five".