8651231 has 2 divisors, whose sum is σ = 8651232. Its totient is φ = 8651230.

The previous prime is 8651207. The next prime is 8651233. The reversal of 8651231 is 1321568.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8651231 is a prime.

It is a super-2 number, since 2×8651231² = 149687595630722, which contains 22 as substring.

Together with 8651233, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8651231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8651233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4325615 + 4325616.

It is an arithmetic number, because the mean of its divisors is an integer number (4325616).

Almost surely, 2^8651231 is an apocalyptic number.

8651231 is a deficient number, since it is larger than the sum of its proper divisors (1).

8651231 is an equidigital number, since it uses as much as digits as its factorization.

8651231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 26.

The square root of 8651231 is about 2941.2975028038. The cubic root of 8651231 is about 205.2859859371.

Adding to 8651231 its reverse (1321568), we get a palindrome (9972799).

The spelling of 8651231 in words is "eight million, six hundred fifty-one thousand, two hundred thirty-one".