86242231 has 2 divisors, whose sum is σ = 86242232. Its totient is φ = 86242230.

The previous prime is 86242193. The next prime is 86242267. The reversal of 86242231 is 13224268.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86242231 - 2¹³ = 86234039 is a prime.

It is a super-2 number, since 2×86242231² = 14875444815714722, 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 86242231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86242531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43121115 + 43121116.

It is an arithmetic number, because the mean of its divisors is an integer number (43121116).

Almost surely, 2^86242231 is an apocalyptic number.

86242231 is a deficient number, since it is larger than the sum of its proper divisors (1).

86242231 is an equidigital number, since it uses as much as digits as its factorization.

86242231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 28.

The square root of 86242231 is about 9286.6695321843. The cubic root of 86242231 is about 441.8145297889.

Adding to 86242231 its reverse (13224268), we get a palindrome (99466499).

The spelling of 86242231 in words is "eighty-six million, two hundred forty-two thousand, two hundred thirty-one".