217001007 has 12 divisors (see below), whose sum is σ = 318125080. Its totient is φ = 142507728.

The previous prime is 217000933. The next prime is 217001009. The reversal of 217001007 is 700100712.

It is not a de Polignac number, because 217001007 - 2¹⁰ = 216999983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217001009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 179332 + ... + 180537.

Almost surely, 2^217001007 is an apocalyptic number.

217001007 is a deficient number, since it is larger than the sum of its proper divisors (101124073).

217001007 is a wasteful number, since it uses less digits than its factorization.

217001007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359942 (or 359939 counting only the distinct ones).

The product of its (nonzero) digits is 98, while the sum is 18.

The square root of 217001007 is about 14730.9540424237. The cubic root of 217001007 is about 600.9254302310.

Adding to 217001007 its reverse (700100712), we get a palindrome (917101719).

The spelling of 217001007 in words is "two hundred seventeen million, one thousand, seven".