18058231 has 2 divisors, whose sum is σ = 18058232. Its totient is φ = 18058230.

The previous prime is 18058223. The next prime is 18058279. The reversal of 18058231 is 13285081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18058231 - 2³ = 18058223 is a prime.

It is a super-2 number, since 2×18058231² = 652199413698722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18058231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18058291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9029115 + 9029116.

It is an arithmetic number, because the mean of its divisors is an integer number (9029116).

Almost surely, 2^18058231 is an apocalyptic number.

18058231 is a deficient number, since it is larger than the sum of its proper divisors (1).

18058231 is an equidigital number, since it uses as much as digits as its factorization.

18058231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 18058231 is about 4249.4977350270. The cubic root of 18058231 is about 262.3564433500.

The spelling of 18058231 in words is "eighteen million, fifty-eight thousand, two hundred thirty-one".