18258225 has 24 divisors (see below), whose sum is σ = 31164672. Its totient is φ = 9422400.

The previous prime is 18258217. The next prime is 18258239. The reversal of 18258225 is 52285281.

It is not a de Polignac number, because 18258225 - 2³ = 18258217 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1602 + ... + 6251.

It is an arithmetic number, because the mean of its divisors is an integer number (1298528).

Almost surely, 2^18258225 is an apocalyptic number.

18258225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18258225 is a deficient number, since it is larger than the sum of its proper divisors (12906447).

18258225 is a wasteful number, since it uses less digits than its factorization.

18258225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7897 (or 7892 counting only the distinct ones).

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

The square root of 18258225 is about 4272.9644276544. The cubic root of 18258225 is about 263.3214178589.

The spelling of 18258225 in words is "eighteen million, two hundred fifty-eight thousand, two hundred twenty-five".