8643231 has 12 divisors (see below), whose sum is σ = 12533352. Its totient is φ = 5739696.

The previous prime is 8643223. The next prime is 8643281. The reversal of 8643231 is 1323468.

It is a happy number.

It is not a de Polignac number, because 8643231 - 2³ = 8643223 is a prime.

It is a super-2 number, since 2×8643231² = 149410884238722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8643195 and 8643204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8643211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 760 + ... + 4226.

It is an arithmetic number, because the mean of its divisors is an integer number (1044446).

Almost surely, 2^8643231 is an apocalyptic number.

8643231 is a deficient number, since it is larger than the sum of its proper divisors (3890121).

8643231 is a wasteful number, since it uses less digits than its factorization.

8643231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3750 (or 3747 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 8643231 is about 2939.9372442282. The cubic root of 8643231 is about 205.2226888037. Note that the first 3 decimals are identical.

Adding to 8643231 its reverse (1323468), we get a palindrome (9966699).

It can be divided in two parts, 864 and 3231, that added together give a triangular number (4095 = T₉₀).

The spelling of 8643231 in words is "eight million, six hundred forty-three thousand, two hundred thirty-one".