3191600081 has 2 divisors, whose sum is σ = 3191600082. Its totient is φ = 3191600080.

The previous prime is 3191600059. The next prime is 3191600117. The reversal of 3191600081 is 1800061913.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2976684481 + 214915600 = 54559^2 + 14660^2 .

It is a cyclic number.

It is not a de Polignac number, because 3191600081 - 2³⁰ = 2117858257 is a prime.

It is a super-2 number, since 2×3191600081² = 20372622154078413122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (3191600011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1595800040 + 1595800041.

It is an arithmetic number, because the mean of its divisors is an integer number (1595800041).

Almost surely, 2^3191600081 is an apocalyptic number.

It is an amenable number.

3191600081 is a deficient number, since it is larger than the sum of its proper divisors (1).

3191600081 is an equidigital number, since it uses as much as digits as its factorization.

3191600081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 3191600081 is about 56494.2482116543. The cubic root of 3191600081 is about 1472.3220710042.

Adding to 3191600081 its reverse (1800061913), we get a palindrome (4991661994).

The spelling of 3191600081 in words is "three billion, one hundred ninety-one million, six hundred thousand, eighty-one".