133217 has 4 divisors (see below), whose sum is σ = 152256. Its totient is φ = 114180.

The previous prime is 133213. The next prime is 133241. The reversal of 133217 is 712331.

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 133217 - 2² = 133213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133195 and 133204.

It is not an unprimeable number, because it can be changed into a prime (133213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9509 + ... + 9522.

It is an arithmetic number, because the mean of its divisors is an integer number (38064).

2¹³³²¹⁷ is an apocalyptic number.

It is an amenable number.

133217 is a deficient number, since it is larger than the sum of its proper divisors (19039).

133217 is an equidigital number, since it uses as much as digits as its factorization.

133217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19038.

The product of its digits is 126, while the sum is 17.

The square root of 133217 is about 364.9890409314. The cubic root of 133217 is about 51.0724332812.

Adding to 133217 its reverse (712331), we get a palindrome (845548).

The spelling of 133217 in words is "one hundred thirty-three thousand, two hundred seventeen".