217012 has 12 divisors (see below), whose sum is σ = 383040. Its totient is φ = 107576.

The previous prime is 217003. The next prime is 217027. The reversal of 217012 is 210712.

It is a plaindrome in base 15.

It is a zygodrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 216983 and 217001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 789 + ... + 1027.

It is an arithmetic number, because the mean of its divisors is an integer number (31920).

2²¹⁷⁰¹² is an apocalyptic number.

It is an amenable number.

217012 is a deficient number, since it is larger than the sum of its proper divisors (166028).

217012 is a wasteful number, since it uses less digits than its factorization.

217012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470 (or 468 counting only the distinct ones).

The product of its (nonzero) digits is 28, while the sum is 13.

The square root of 217012 is about 465.8454679397. The cubic root of 217012 is about 60.0935577437.

Adding to 217012 its reverse (210712), we get a palindrome (427724).

The spelling of 217012 in words is "two hundred seventeen thousand, twelve", and thus it is an iban number.