135317217 has 8 divisors (see below), whose sum is σ = 206197696. Its totient is φ = 77324112.

The previous prime is 135317213. The next prime is 135317239. The reversal of 135317217 is 712713531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 135317217 - 2² = 135317213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135317213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3221818 + ... + 3221859.

It is an arithmetic number, because the mean of its divisors is an integer number (25774712).

Almost surely, 2^135317217 is an apocalyptic number.

It is an amenable number.

135317217 is a deficient number, since it is larger than the sum of its proper divisors (70880479).

135317217 is an equidigital number, since it uses as much as digits as its factorization.

135317217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6443687.

The product of its digits is 4410, while the sum is 30.

The square root of 135317217 is about 11632.5928751934. The cubic root of 135317217 is about 513.3942722487.

The spelling of 135317217 in words is "one hundred thirty-five million, three hundred seventeen thousand, two hundred seventeen".