172171131 has 16 divisors (see below), whose sum is σ = 251535360. Its totient is φ = 103885920.

The previous prime is 172171093. The next prime is 172171151. The reversal of 172171131 is 131171271.

It is not a de Polignac number, because 172171131 - 2⁷ = 172171003 is a prime.

It is a super-2 number, since 2×172171131² = 59285796699638322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (172171151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3835 + ... + 18948.

It is an arithmetic number, because the mean of its divisors is an integer number (15720960).

Almost surely, 2^172171131 is an apocalyptic number.

172171131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

172171131 is a deficient number, since it is larger than the sum of its proper divisors (79364229).

172171131 is a wasteful number, since it uses less digits than its factorization.

172171131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23026.

The product of its digits is 294, while the sum is 24.

The square root of 172171131 is about 13121.3997347844. The cubic root of 172171131 is about 556.3141555258.

The spelling of 172171131 in words is "one hundred seventy-two million, one hundred seventy-one thousand, one hundred thirty-one".