8231231 has 2 divisors, whose sum is σ = 8231232. Its totient is φ = 8231230.

The previous prime is 8231227. The next prime is 8231239. The reversal of 8231231 is 1321328.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8231231 - 2² = 8231227 is a prime.

It is a super-2 number, since 2×8231231² = 135506327550722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8231239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4115615 + 4115616.

It is an arithmetic number, because the mean of its divisors is an integer number (4115616).

Almost surely, 2^8231231 is an apocalyptic number.

8231231 is a deficient number, since it is larger than the sum of its proper divisors (1).

8231231 is an equidigital number, since it uses as much as digits as its factorization.

8231231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 20.

The square root of 8231231 is about 2869.0121993467. The cubic root of 8231231 is about 201.9086522894.

Adding to 8231231 its reverse (1321328), we get a palindrome (9552559).

Subtracting from 8231231 its reverse (1321328), we obtain a triangular number (6909903 = T₃₇₁₇).

It can be divided in two parts, 82 and 31231, that added together give a palindrome (31313).

The spelling of 8231231 in words is "eight million, two hundred thirty-one thousand, two hundred thirty-one".