26135531 has 2 divisors, whose sum is σ = 26135532. Its totient is φ = 26135530.

The previous prime is 26135513. The next prime is 26135539. The reversal of 26135531 is 13553162.

Together with previous prime (26135513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26135531 - 2¹⁴ = 26119147 is a prime.

It is a super-2 number, since 2×26135531² = 1366131961303922, which contains 22 as substring.

It is equal to p_1632473 and since 26135531 and 1632473 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26135531.

It is not a weakly prime, because it can be changed into another prime (26135539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13067765 + 13067766.

It is an arithmetic number, because the mean of its divisors is an integer number (13067766).

Almost surely, 2^26135531 is an apocalyptic number.

26135531 is a deficient number, since it is larger than the sum of its proper divisors (1).

26135531 is an equidigital number, since it uses as much as digits as its factorization.

26135531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2700, while the sum is 26.

The square root of 26135531 is about 5112.2921473640. The cubic root of 26135531 is about 296.7634714733.

Adding to 26135531 its reverse (13553162), we get a palindrome (39688693).

The spelling of 26135531 in words is "twenty-six million, one hundred thirty-five thousand, five hundred thirty-one".