217493 has 4 divisors (see below), whose sum is σ = 228960. Its totient is φ = 206028.

The previous prime is 217489. The next prime is 217499. The reversal of 217493 is 394712.

217493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 217493 - 2² = 217489 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217499) 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, 5705 + ... + 5742.

It is an arithmetic number, because the mean of its divisors is an integer number (57240).

2²¹⁷⁴⁹³ is an apocalyptic number.

It is an amenable number.

217493 is a deficient number, since it is larger than the sum of its proper divisors (11467).

217493 is a wasteful number, since it uses less digits than its factorization.

217493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11466.

The product of its digits is 1512, while the sum is 26.

The square root of 217493 is about 466.3614478063. The cubic root of 217493 is about 60.1379234498.

The spelling of 217493 in words is "two hundred seventeen thousand, four hundred ninety-three".