172871159 has 4 divisors (see below), whose sum is σ = 178447680. Its totient is φ = 167294640.

The previous prime is 172871143. The next prime is 172871191. The reversal of 172871159 is 951178271.

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 172871159 - 2⁴ = 172871143 is a prime.

It is a super-2 number, since 2×172871159² = 59768875228006562, which 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 (172871359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2788214 + ... + 2788275.

It is an arithmetic number, because the mean of its divisors is an integer number (44611920).

Almost surely, 2^172871159 is an apocalyptic number.

172871159 is a deficient number, since it is larger than the sum of its proper divisors (5576521).

172871159 is an equidigital number, since it uses as much as digits as its factorization.

172871159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5576520.

The product of its digits is 35280, while the sum is 41.

The square root of 172871159 is about 13148.0477258032. The cubic root of 172871159 is about 557.0671057493.

The spelling of 172871159 in words is "one hundred seventy-two million, eight hundred seventy-one thousand, one hundred fifty-nine".