70217 has 6 divisors (see below), whose sum is σ = 81738. Its totient is φ = 60144.

The previous prime is 70207. The next prime is 70223. The reversal of 70217 is 71207.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 67081 + 3136 = 259^2 + 56^2 .

It is not a de Polignac number, because 70217 - 2⁴ = 70201 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a nialpdrome in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 70195 and 70204.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 70217.

It is not an unprimeable number, because it can be changed into a prime (70207) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 668 + ... + 765.

It is an arithmetic number, because the mean of its divisors is an integer number (13623).

2⁷⁰²¹⁷ is an apocalyptic number.

It is an amenable number.

70217 is a deficient number, since it is larger than the sum of its proper divisors (11521).

70217 is a wasteful number, since it uses less digits than its factorization.

70217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1447 (or 1440 counting only the distinct ones).

The product of its (nonzero) digits is 98, while the sum is 17.

The square root of 70217 is about 264.9849052305. The cubic root of 70217 is about 41.2553956823.

Subtracting 70217 from its reverse (71207), we obtain a triangular number (990 = T₄₄).

The spelling of 70217 in words is "seventy thousand, two hundred seventeen", and thus it is an iban number.