3161138321 has 16 divisors (see below), whose sum is σ = 3684890880. Its totient is φ = 2679886080.

The previous prime is 3161138317. The next prime is 3161138333. The reversal of 3161138321 is 1238311613.

It is a cyclic number.

It is not a de Polignac number, because 3161138321 - 2² = 3161138317 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3161138371) 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, 57161 + ... + 97926.

It is an arithmetic number, because the mean of its divisors is an integer number (230305680).

Almost surely, 2^3161138321 is an apocalyptic number.

It is an amenable number.

3161138321 is a deficient number, since it is larger than the sum of its proper divisors (523752559).

3161138321 is a wasteful number, since it uses less digits than its factorization.

3161138321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155224.

The product of its digits is 2592, while the sum is 29.

The square root of 3161138321 is about 56224.0012894849. The cubic root of 3161138321 is about 1467.6229683153.

Adding to 3161138321 its reverse (1238311613), we get a palindrome (4399449934).

The spelling of 3161138321 in words is "three billion, one hundred sixty-one million, one hundred thirty-eight thousand, three hundred twenty-one".