26513551 has 2 divisors, whose sum is σ = 26513552. Its totient is φ = 26513550.

The previous prime is 26513521. The next prime is 26513561. The reversal of 26513551 is 15531562.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26513551 - 2⁵ = 26513519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26513521) 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, 13256775 + 13256776.

It is an arithmetic number, because the mean of its divisors is an integer number (13256776).

Almost surely, 2^26513551 is an apocalyptic number.

26513551 is a deficient number, since it is larger than the sum of its proper divisors (1).

26513551 is an equidigital number, since it uses as much as digits as its factorization.

26513551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4500, while the sum is 28.

The square root of 26513551 is about 5149.1310917474. The cubic root of 26513551 is about 298.1874074544.

The spelling of 26513551 in words is "twenty-six million, five hundred thirteen thousand, five hundred fifty-one".