86543231 has 2 divisors, whose sum is σ = 86543232. Its totient is φ = 86543230.

The previous prime is 86543213. The next prime is 86543239. The reversal of 86543231 is 13234568.

Together with previous prime (86543213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86543231 - 2⁶ = 86543167 is a prime.

It is a super-2 number, since 2×86543231² = 14979461663838722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86543239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43271615 + 43271616.

It is an arithmetic number, because the mean of its divisors is an integer number (43271616).

Almost surely, 2^86543231 is an apocalyptic number.

86543231 is a deficient number, since it is larger than the sum of its proper divisors (1).

86543231 is an equidigital number, since it uses as much as digits as its factorization.

86543231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 32.

The square root of 86543231 is about 9302.8614415136. The cubic root of 86543231 is about 442.3279354853.

Adding to 86543231 its reverse (13234568), we get a palindrome (99777799).

The spelling of 86543231 in words is "eighty-six million, five hundred forty-three thousand, two hundred thirty-one".