3161531161 has 2 divisors, whose sum is σ = 3161531162. Its totient is φ = 3161531160.

The previous prime is 3161531147. The next prime is 3161531167. The reversal of 3161531161 is 1611351613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2017806400 + 1143724761 = 44920^2 + 33819^2 .

It is a cyclic number.

It is not a de Polignac number, because 3161531161 - 2⁹ = 3161530649 is a prime.

It is not a weakly prime, because it can be changed into another prime (3161531167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1580765580 + 1580765581.

It is an arithmetic number, because the mean of its divisors is an integer number (1580765581).

Almost surely, 2^3161531161 is an apocalyptic number.

It is an amenable number.

3161531161 is a deficient number, since it is larger than the sum of its proper divisors (1).

3161531161 is an equidigital number, since it uses as much as digits as its factorization.

3161531161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1620, while the sum is 28.

The square root of 3161531161 is about 56227.4947067713. The cubic root of 3161531161 is about 1467.6837604591.

Adding to 3161531161 its reverse (1611351613), we get a palindrome (4772882774).

The spelling of 3161531161 in words is "three billion, one hundred sixty-one million, five hundred thirty-one thousand, one hundred sixty-one".