3171398321 has 16 divisors (see below), whose sum is σ = 3947126400. Its totient is φ = 2481038208.

The previous prime is 3171398317. The next prime is 3171398323. The reversal of 3171398321 is 1238931713.

It is a cyclic number.

It is not a de Polignac number, because 3171398321 - 2² = 3171398317 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3171398323) 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 15 ways as a sum of consecutive naturals, for example, 187691 + ... + 203888.

It is an arithmetic number, because the mean of its divisors is an integer number (246695400).

Almost surely, 2^3171398321 is an apocalyptic number.

It is an amenable number.

3171398321 is a deficient number, since it is larger than the sum of its proper divisors (775728079).

3171398321 is a wasteful number, since it uses less digits than its factorization.

3171398321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391688.

The product of its digits is 27216, while the sum is 38.

The square root of 3171398321 is about 56315.1695460468. The cubic root of 3171398321 is about 1469.2090583628.

The spelling of 3171398321 in words is "three billion, one hundred seventy-one million, three hundred ninety-eight thousand, three hundred twenty-one".