2175131321 has 32 divisors (see below), whose sum is σ = 2554460928. Its totient is φ = 1831991040.

The previous prime is 2175131311. The next prime is 2175131323. The reversal of 2175131321 is 1231315712.

It is a de Polignac number, because none of the positive numbers 2^k-2175131321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2175131323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2967071 + ... + 2967803.

It is an arithmetic number, because the mean of its divisors is an integer number (79826904).

Almost surely, 2^2175131321 is an apocalyptic number.

It is an amenable number.

2175131321 is a deficient number, since it is larger than the sum of its proper divisors (379329607).

2175131321 is a wasteful number, since it uses less digits than its factorization.

2175131321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121.

The product of its digits is 1260, while the sum is 26.

The square root of 2175131321 is about 46638.3031530951. The cubic root of 2175131321 is about 1295.6722598918.

The spelling of 2175131321 in words is "two billion, one hundred seventy-five million, one hundred thirty-one thousand, three hundred twenty-one".