6865531 has 2 divisors, whose sum is σ = 6865532. Its totient is φ = 6865530.

The previous prime is 6865519. The next prime is 6865543. The reversal of 6865531 is 1355686.

It is a balanced prime because it is at equal distance from previous prime (6865519) and next prime (6865543).

It is a cyclic number.

It is not a de Polignac number, because 6865531 - 2⁵ = 6865499 is a prime.

It is a super-2 number, since 2×6865531² = 94271031823922, which contains 22 as substring.

6865531 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (6865561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3432765 + 3432766.

It is an arithmetic number, because the mean of its divisors is an integer number (3432766).

Almost surely, 2^6865531 is an apocalyptic number.

6865531 is a deficient number, since it is larger than the sum of its proper divisors (1).

6865531 is an equidigital number, since it uses as much as digits as its factorization.

6865531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 34.

The square root of 6865531 is about 2620.2158308048. The cubic root of 6865531 is about 190.0602855790.

It can be divided in two parts, 68655 and 31, that added together give a palindrome (68686).

The spelling of 6865531 in words is "six million, eight hundred sixty-five thousand, five hundred thirty-one".