172517931206 has 4 divisors (see below), whose sum is σ = 258776896812. Its totient is φ = 86258965602.

The previous prime is 172517931167. The next prime is 172517931221. The reversal of 172517931206 is 602139715271.

172517931206 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 602139715271 = 1033 ⋅582903887.

It is a super-2 number, since 2×172517931206² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43129482800 + ... + 43129482803.

It is an arithmetic number, because the mean of its divisors is an integer number (64694224203).

Almost surely, 2^172517931206 is an apocalyptic number.

172517931206 is a deficient number, since it is larger than the sum of its proper divisors (86258965606).

172517931206 is an equidigital number, since it uses as much as digits as its factorization.

172517931206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86258965605.

The product of its (nonzero) digits is 158760, while the sum is 44.

The spelling of 172517931206 in words is "one hundred seventy-two billion, five hundred seventeen million, nine hundred thirty-one thousand, two hundred six".