18825225 has 12 divisors (see below), whose sum is σ = 31124496. Its totient is φ = 10040080.

The previous prime is 18825221. The next prime is 18825227. The reversal of 18825225 is 52252881.

It is not a de Polignac number, because 18825225 - 2² = 18825221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18825221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 125427 + ... + 125576.

It is an arithmetic number, because the mean of its divisors is an integer number (2593708).

Almost surely, 2^18825225 is an apocalyptic number.

18825225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18825225 is a deficient number, since it is larger than the sum of its proper divisors (12299271).

18825225 is a wasteful number, since it uses less digits than its factorization.

18825225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251016 (or 251011 counting only the distinct ones).

The product of its digits is 12800, while the sum is 33.

The square root of 18825225 is about 4338.8045588618. The cubic root of 18825225 is about 266.0194504028.

The spelling of 18825225 in words is "eighteen million, eight hundred twenty-five thousand, two hundred twenty-five".