16816325 has 6 divisors (see below), whose sum is σ = 20852274. Its totient is φ = 13453040.

The previous prime is 16816313. The next prime is 16816343. The reversal of 16816325 is 52361861.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 178084 + 16638241 = 422^2 + 4079^2 .

It is not a de Polignac number, because 16816325 - 2²² = 12622021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16816291 and 16816300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 336302 + ... + 336351.

It is an arithmetic number, because the mean of its divisors is an integer number (3475379).

Almost surely, 2^16816325 is an apocalyptic number.

It is an amenable number.

16816325 is a deficient number, since it is larger than the sum of its proper divisors (4035949).

16816325 is an equidigital number, since it uses as much as digits as its factorization.

16816325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672663 (or 672658 counting only the distinct ones).

The product of its digits is 8640, while the sum is 32.

The square root of 16816325 is about 4100.7712689200. The cubic root of 16816325 is about 256.1987642954.

The spelling of 16816325 in words is "sixteen million, eight hundred sixteen thousand, three hundred twenty-five".