6538531 has 2 divisors, whose sum is σ = 6538532. Its totient is φ = 6538530.

The previous prime is 6538517. The next prime is 6538549. The reversal of 6538531 is 1358356.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6538531 - 2⁷ = 6538403 is a prime.

It is a super-2 number, since 2×6538531² = 85504775275922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6538493 and 6538502.

It is not a weakly prime, because it can be changed into another prime (6538561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3269265 + 3269266.

It is an arithmetic number, because the mean of its divisors is an integer number (3269266).

Almost surely, 2^6538531 is an apocalyptic number.

6538531 is a deficient number, since it is larger than the sum of its proper divisors (1).

6538531 is an equidigital number, since it uses as much as digits as its factorization.

6538531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 31.

The square root of 6538531 is about 2557.0551421508. The cubic root of 6538531 is about 186.9935941070.

The spelling of 6538531 in words is "six million, five hundred thirty-eight thousand, five hundred thirty-one".