26108531 has 2 divisors, whose sum is σ = 26108532. Its totient is φ = 26108530.

The previous prime is 26108521. The next prime is 26108567. The reversal of 26108531 is 13580162.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26108531 is a prime.

It is a super-2 number, since 2×26108531² = 1363310781955922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26108531.

It is not a weakly prime, because it can be changed into another prime (26108521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13054265 + 13054266.

It is an arithmetic number, because the mean of its divisors is an integer number (13054266).

Almost surely, 2^26108531 is an apocalyptic number.

26108531 is a deficient number, since it is larger than the sum of its proper divisors (1).

26108531 is an equidigital number, since it uses as much as digits as its factorization.

26108531 is an odious number, because the sum of its binary digits is odd.

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

The square root of 26108531 is about 5109.6507708453. The cubic root of 26108531 is about 296.6612431502.

Adding to 26108531 its reverse (13580162), we get a palindrome (39688693).

The spelling of 26108531 in words is "twenty-six million, one hundred eight thousand, five hundred thirty-one".