217082 has 4 divisors (see below), whose sum is σ = 325626. Its totient is φ = 108540.

The previous prime is 217081. The next prime is 217111. The reversal of 217082 is 280712.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 143641 + 73441 = 379^2 + 271^2 .

It is not an unprimeable number, because it can be changed into a prime (217081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54269 + ... + 54272.

2²¹⁷⁰⁸² is an apocalyptic number.

217082 is a deficient number, since it is larger than the sum of its proper divisors (108544).

217082 is a wasteful number, since it uses less digits than its factorization.

217082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108543.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 217082 is about 465.9205940930. The cubic root of 217082 is about 60.1000183647.

Adding to 217082 its reverse (280712), we get a palindrome (497794).

The spelling of 217082 in words is "two hundred seventeen thousand, eighty-two".