18127225 has 12 divisors (see below), whose sum is σ = 23086444. Its totient is φ = 14109120.

The previous prime is 18127217. The next prime is 18127247. The reversal of 18127225 is 52272181.

It can be written as a sum of positive squares in 6 ways, for example, as 13689 + 18113536 = 117^2 + 4256^2 .

It is not a de Polignac number, because 18127225 - 2³ = 18127217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18127193 and 18127202.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8874 + ... + 10723.

Almost surely, 2^18127225 is an apocalyptic number.

It is an amenable number.

18127225 is a deficient number, since it is larger than the sum of its proper divisors (4959219).

18127225 is a wasteful number, since it uses less digits than its factorization.

18127225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19644 (or 19639 counting only the distinct ones).

The product of its digits is 2240, while the sum is 28.

The square root of 18127225 is about 4257.6078964602. The cubic root of 18127225 is about 262.6901419049.

The spelling of 18127225 in words is "eighteen million, one hundred twenty-seven thousand, two hundred twenty-five".