217133 has 4 divisors (see below), whose sum is σ = 248160. Its totient is φ = 186108.

The previous prime is 217121. The next prime is 217157. The reversal of 217133 is 331712.

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 217133 - 2⁴ = 217117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15503 + ... + 15516.

It is an arithmetic number, because the mean of its divisors is an integer number (62040).

2²¹⁷¹³³ is an apocalyptic number.

It is an amenable number.

217133 is a deficient number, since it is larger than the sum of its proper divisors (31027).

217133 is an equidigital number, since it uses as much as digits as its factorization.

217133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31026.

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

The square root of 217133 is about 465.9753212349. The cubic root of 217133 is about 60.1047245140.

Adding to 217133 its reverse (331712), we get a palindrome (548845).

The spelling of 217133 in words is "two hundred seventeen thousand, one hundred thirty-three".