217517713011 has 16 divisors (see below), whose sum is σ = 324225454720. Its totient is φ = 144122162760.

The previous prime is 217517712961. The next prime is 217517713037. The reversal of 217517713011 is 110317715712.

It is a happy number.

217517713011 is a `hidden beast` number, since 2 + 1 + 7 + 517 + 7 + 130 + 1 + 1 = 666.

It is not a de Polignac number, because 217517713011 - 2⁶ = 217517712947 is a prime.

It is a super-2 number, since 2×217517713011² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (217517713411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24707905 + ... + 24716706.

It is an arithmetic number, because the mean of its divisors is an integer number (20264090920).

Almost surely, 2^217517713011 is an apocalyptic number.

217517713011 is a deficient number, since it is larger than the sum of its proper divisors (106707741709).

217517713011 is a wasteful number, since it uses less digits than its factorization.

217517713011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49424783 (or 49424777 counting only the distinct ones).

The product of its (nonzero) digits is 10290, while the sum is 36.

The spelling of 217517713011 in words is "two hundred seventeen billion, five hundred seventeen million, seven hundred thirteen thousand, eleven".