3127321161 has 6 divisors (see below), whose sum is σ = 4517241690. Its totient is φ = 2084880768.

The previous prime is 3127321121. The next prime is 3127321187. The reversal of 3127321161 is 1611237213.

It can be written as a sum of positive squares in only one way, i.e., 2717015625 + 410305536 = 52125^2 + 20256^2 .

It is not a de Polignac number, because 3127321161 - 2¹⁵ = 3127288393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3127321121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 173740056 + ... + 173740073.

It is an arithmetic number, because the mean of its divisors is an integer number (752873615).

Almost surely, 2^3127321161 is an apocalyptic number.

It is an amenable number.

3127321161 is a deficient number, since it is larger than the sum of its proper divisors (1389920529).

3127321161 is a wasteful number, since it uses less digits than its factorization.

3127321161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347480135 (or 347480132 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 3127321161 is about 55922.4566788692. The cubic root of 3127321161 is about 1462.3707590374.

Adding to 3127321161 its reverse (1611237213), we get a palindrome (4738558374).

The spelling of 3127321161 in words is "three billion, one hundred twenty-seven million, three hundred twenty-one thousand, one hundred sixty-one".