217323 has 10 divisors (see below), whose sum is σ = 324764. Its totient is φ = 144828.

The previous prime is 217319. The next prime is 217333. The reversal of 217323 is 323712.

It is not a de Polignac number, because 217323 - 2² = 217319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 217296 and 217305.

It is not an unprimeable number, because it can be changed into a prime (217313) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1261 + ... + 1422.

2²¹⁷³²³ is an apocalyptic number.

217323 is a deficient number, since it is larger than the sum of its proper divisors (107441).

217323 is an equidigital number, since it uses as much as digits as its factorization.

217323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2695 (or 2686 counting only the distinct ones).

The product of its digits is 252, while the sum is 18.

The square root of 217323 is about 466.1791501129. The cubic root of 217323 is about 60.1222507434.

The spelling of 217323 in words is "two hundred seventeen thousand, three hundred twenty-three", and thus it is an iban number.