71171172 has 36 divisors (see below), whose sum is σ = 182080080. Its totient is φ = 23436912.

The previous prime is 71171171. The next prime is 71171183. The reversal of 71171172 is 27117117.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (71171171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8922 + ... + 14897.

It is an arithmetic number, because the mean of its divisors is an integer number (5057780).

Almost surely, 2^71171172 is an apocalyptic number.

It is an amenable number.

71171172 is an abundant number, since it is smaller than the sum of its proper divisors (110908908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71171172 is a wasteful number, since it uses less digits than its factorization.

71171172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23912 (or 23907 counting only the distinct ones).

The product of its digits is 686, while the sum is 27.

The square root of 71171172 is about 8436.3008481206. The cubic root of 71171172 is about 414.4142741042.

Adding to 71171172 its reverse (27117117), we get a palindrome (98288289).

The spelling of 71171172 in words is "seventy-one million, one hundred seventy-one thousand, one hundred seventy-two".