212217 has 8 divisors (see below), whose sum is σ = 285696. Its totient is φ = 140112.

The previous prime is 212209. The next prime is 212227. The reversal of 212217 is 712212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212217 - 2³ = 212209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212196 and 212205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103 + ... + 659.

It is an arithmetic number, because the mean of its divisors is an integer number (35712).

2²¹²²¹⁷ is an apocalyptic number.

It is an amenable number.

212217 is a deficient number, since it is larger than the sum of its proper divisors (73479).

212217 is a wasteful number, since it uses less digits than its factorization.

212217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687.

The product of its digits is 56, while the sum is 15.

The square root of 212217 is about 460.6701640002. The cubic root of 212217 is about 59.6476571814.

Adding to 212217 its reverse (712212), we get a palindrome (924429).

The spelling of 212217 in words is "two hundred twelve thousand, two hundred seventeen", and thus it is an iban number.