17217220005 has 16 divisors (see below), whose sum is σ = 30608391360. Its totient is φ = 9182517264.

The previous prime is 17217220003. The next prime is 17217220021. The reversal of 17217220005 is 50002271271.

It is not a de Polignac number, because 17217220005 - 2¹ = 17217220003 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17217220001) 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, 63767347 + ... + 63767616.

It is an arithmetic number, because the mean of its divisors is an integer number (1913024460).

Almost surely, 2^17217220005 is an apocalyptic number.

17217220005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

17217220005 is a deficient number, since it is larger than the sum of its proper divisors (13391171355).

17217220005 is a wasteful number, since it uses less digits than its factorization.

17217220005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127534977 (or 127534971 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 27.

Adding to 17217220005 its reverse (50002271271), we get a palindrome (67219491276).

The spelling of 17217220005 in words is "seventeen billion, two hundred seventeen million, two hundred twenty thousand, five".