18025231 has 8 divisors (see below), whose sum is σ = 20680704. Its totient is φ = 15389880.

The previous prime is 18025223. The next prime is 18025283. The reversal of 18025231 is 13252081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18025231 - 2³ = 18025223 is a prime.

It is a super-2 number, since 2×18025231² = 649817905206722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18025531) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3055 + ... + 6736.

It is an arithmetic number, because the mean of its divisors is an integer number (2585088).

Almost surely, 2^18025231 is an apocalyptic number.

18025231 is a deficient number, since it is larger than the sum of its proper divisors (2655473).

18025231 is an equidigital number, since it uses as much as digits as its factorization.

18025231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10061.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 18025231 is about 4245.6131477091. The cubic root of 18025231 is about 262.1965339660.

The spelling of 18025231 in words is "eighteen million, twenty-five thousand, two hundred thirty-one".