135315217 has 4 divisors (see below), whose sum is σ = 139680256. Its totient is φ = 130950180.

The previous prime is 135315203. The next prime is 135315227. The reversal of 135315217 is 712513531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 135315217 - 2¹⁵ = 135282449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135315227) 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 in 3 ways as a sum of consecutive naturals, for example, 2182473 + ... + 2182534.

It is an arithmetic number, because the mean of its divisors is an integer number (34920064).

Almost surely, 2^135315217 is an apocalyptic number.

It is an amenable number.

135315217 is a deficient number, since it is larger than the sum of its proper divisors (4365039).

135315217 is an equidigital number, since it uses as much as digits as its factorization.

135315217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4365038.

The product of its digits is 3150, while the sum is 28.

The square root of 135315217 is about 11632.5069095187. The cubic root of 135315217 is about 513.3917428992.

Adding to 135315217 its reverse (712513531), we get a palindrome (847828748).

The spelling of 135315217 in words is "one hundred thirty-five million, three hundred fifteen thousand, two hundred seventeen".