135216511 has 2 divisors, whose sum is σ = 135216512. Its totient is φ = 135216510.

The previous prime is 135216503. The next prime is 135216527. The reversal of 135216511 is 115612531.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135216511 - 2³ = 135216503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135216311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67608255 + 67608256.

It is an arithmetic number, because the mean of its divisors is an integer number (67608256).

Almost surely, 2^135216511 is an apocalyptic number.

135216511 is a deficient number, since it is larger than the sum of its proper divisors (1).

135216511 is an equidigital number, since it uses as much as digits as its factorization.

135216511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 900, while the sum is 25.

The square root of 135216511 is about 11628.2634559078. The cubic root of 135216511 is about 513.2668809334.

The spelling of 135216511 in words is "one hundred thirty-five million, two hundred sixteen thousand, five hundred eleven".