217029011 has 16 divisors (see below), whose sum is σ = 229975200. Its totient is φ = 204492288.

The previous prime is 217028971. The next prime is 217029049. The reversal of 217029011 is 110920712.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-217029011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (217029611) 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 15 ways as a sum of consecutive naturals, for example, 517760 + ... + 518178.

It is an arithmetic number, because the mean of its divisors is an integer number (14373450).

Almost surely, 2^217029011 is an apocalyptic number.

217029011 is a deficient number, since it is larger than the sum of its proper divisors (12946189).

217029011 is a wasteful number, since it uses less digits than its factorization.

217029011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838.

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 217029011 is about 14731.9045272497. The cubic root of 217029011 is about 600.9512789465.

Adding to 217029011 its reverse (110920712), we get a palindrome (327949723).

The spelling of 217029011 in words is "two hundred seventeen million, twenty-nine thousand, eleven".