16279225 has 6 divisors (see below), whose sum is σ = 20186270. Its totient is φ = 13023360.

The previous prime is 16279213. The next prime is 16279229. The reversal of 16279225 is 52297261.

It can be written as a sum of positive squares in 3 ways, for example, as 22201 + 16257024 = 149^2 + 4032^2 .

It is not a de Polignac number, because 16279225 - 2¹³ = 16271033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16279229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 325560 + ... + 325609.

Almost surely, 2^16279225 is an apocalyptic number.

It is an amenable number.

16279225 is a deficient number, since it is larger than the sum of its proper divisors (3907045).

16279225 is an equidigital number, since it uses as much as digits as its factorization.

16279225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651179 (or 651174 counting only the distinct ones).

The product of its digits is 15120, while the sum is 34.

The square root of 16279225 is about 4034.7521609140. The cubic root of 16279225 is about 253.4416040357.

The spelling of 16279225 in words is "sixteen million, two hundred seventy-nine thousand, two hundred twenty-five".