201217 has 4 divisors (see below), whose sum is σ = 202176. Its totient is φ = 200260.

The previous prime is 201211. The next prime is 201233. The reversal of 201217 is 712102.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 201217 - 2³ = 201209 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 201197 and 201206.

It is not an unprimeable number, because it can be changed into a prime (201211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13 + ... + 634.

It is an arithmetic number, because the mean of its divisors is an integer number (50544).

It is a Proth number, since it is equal to 393 ⋅ 2⁹ + 1 and 393 < 2⁹.

2²⁰¹²¹⁷ is an apocalyptic number.

It is an amenable number.

201217 is a deficient number, since it is larger than the sum of its proper divisors (959).

201217 is an equidigital number, since it uses as much as digits as its factorization.

201217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 958.

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

The square root of 201217 is about 448.5721792532. The cubic root of 201217 is about 58.5987326311.

Adding to 201217 its reverse (712102), we get a palindrome (913319).

The spelling of 201217 in words is "two hundred one thousand, two hundred seventeen", and thus it is an iban number.