17172311205 has 32 divisors (see below), whose sum is σ = 31407611904. Its totient is φ = 7848495936.

The previous prime is 17172311197. The next prime is 17172311231. The reversal of 17172311205 is 50211327171.

It is not a de Polignac number, because 17172311205 - 2³ = 17172311197 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 556492 + ... + 586538.

It is an arithmetic number, because the mean of its divisors is an integer number (981487872).

Almost surely, 2^17172311205 is an apocalyptic number.

17172311205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

17172311205 is a deficient number, since it is larger than the sum of its proper divisors (14235300699).

17172311205 is a wasteful number, since it uses less digits than its factorization.

17172311205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35505.

The product of its (nonzero) digits is 2940, while the sum is 30.

Adding to 17172311205 its reverse (50211327171), we get a palindrome (67383638376).

The spelling of 17172311205 in words is "seventeen billion, one hundred seventy-two million, three hundred eleven thousand, two hundred five".