6815231 has 2 divisors, whose sum is σ = 6815232. Its totient is φ = 6815230.

The previous prime is 6815227. The next prime is 6815233. The reversal of 6815231 is 1325186.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6815231 - 2² = 6815227 is a prime.

It is a super-2 number, since 2×6815231² = 92894747166722, which contains 22 as substring.

Together with 6815233, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 6815231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6815233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3407615 + 3407616.

It is an arithmetic number, because the mean of its divisors is an integer number (3407616).

Almost surely, 2^6815231 is an apocalyptic number.

6815231 is a deficient number, since it is larger than the sum of its proper divisors (1).

6815231 is an equidigital number, since it uses as much as digits as its factorization.

6815231 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 6815231 is about 2610.5997395235. The cubic root of 6815231 is about 189.5949913962.

The spelling of 6815231 in words is "six million, eight hundred fifteen thousand, two hundred thirty-one".