2171323172 has 12 divisors (see below), whose sum is σ = 3804134796. Its totient is φ = 1084427520.

The previous prime is 2171323159. The next prime is 2171323183. The reversal of 2171323172 is 2713231712.

It can be written as a sum of positive squares in 2 ways, for example, as 332114176 + 1839208996 = 18224^2 + 42886^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 304553 + ... + 311600.

It is an arithmetic number, because the mean of its divisors is an integer number (317011233).

Almost surely, 2^2171323172 is an apocalyptic number.

It is an amenable number.

2171323172 is a deficient number, since it is larger than the sum of its proper divisors (1632811624).

2171323172 is a wasteful number, since it uses less digits than its factorization.

2171323172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617038 (or 617036 counting only the distinct ones).

The product of its digits is 3528, while the sum is 29.

The square root of 2171323172 is about 46597.4588577532. The cubic root of 2171323172 is about 1294.9156779371.

Adding to 2171323172 its reverse (2713231712), we get a palindrome (4884554884).

The spelling of 2171323172 in words is "two billion, one hundred seventy-one million, three hundred twenty-three thousand, one hundred seventy-two".