172006732831 has 4 divisors (see below), whose sum is σ = 172427287600. Its totient is φ = 171586178064.

The previous prime is 172006732771. The next prime is 172006732939. The reversal of 172006732831 is 138237600271.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 172006732831 - 2⁹ = 172006732319 is a prime.

It is a super-2 number, since 2×172006732831² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172006712831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210276771 + ... + 210277588.

It is an arithmetic number, because the mean of its divisors is an integer number (43106821900).

Almost surely, 2^172006732831 is an apocalyptic number.

172006732831 is a deficient number, since it is larger than the sum of its proper divisors (420554769).

172006732831 is an equidigital number, since it uses as much as digits as its factorization.

172006732831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420554768.

The product of its (nonzero) digits is 84672, while the sum is 40.

The spelling of 172006732831 in words is "one hundred seventy-two billion, six million, seven hundred thirty-two thousand, eight hundred thirty-one".