217170439061 has 16 divisors (see below), whose sum is σ = 224630102400. Its totient is φ = 209832638400.

The previous prime is 217170439027. The next prime is 217170439063. The reversal of 217170439061 is 160934071712.

It is a de Polignac number, because none of the positive numbers 2^k-217170439061 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 (217170439063) 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, 1407011 + ... + 1553711.

It is an arithmetic number, because the mean of its divisors is an integer number (14039381400).

Almost surely, 2^217170439061 is an apocalyptic number.

It is an amenable number.

217170439061 is a deficient number, since it is larger than the sum of its proper divisors (7459663339).

217170439061 is a wasteful number, since it uses less digits than its factorization.

217170439061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147116.

The product of its (nonzero) digits is 63504, while the sum is 41.

The spelling of 217170439061 in words is "two hundred seventeen billion, one hundred seventy million, four hundred thirty-nine thousand, sixty-one".