172831257867 has 12 divisors (see below), whose sum is σ = 243208530600. Its totient is φ = 109156583232.

The previous prime is 172831257793. The next prime is 172831257869. The reversal of 172831257867 is 768752138271.

172831257867 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 172831257867 - 2²³ = 172822869259 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (172831257869) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 79791742 + ... + 79793907.

It is an arithmetic number, because the mean of its divisors is an integer number (20267377550).

Almost surely, 2^172831257867 is an apocalyptic number.

172831257867 is a deficient number, since it is larger than the sum of its proper divisors (70377272733).

172831257867 is a wasteful number, since it uses less digits than its factorization.

172831257867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159585690 (or 159585671 counting only the distinct ones).

The product of its digits is 7902720, while the sum is 57.

The spelling of 172831257867 in words is "one hundred seventy-two billion, eight hundred thirty-one million, two hundred fifty-seven thousand, eight hundred sixty-seven".