3205131161 has 2 divisors, whose sum is σ = 3205131162. Its totient is φ = 3205131160.

The previous prime is 3205131143. The next prime is 3205131173. The reversal of 3205131161 is 1611315023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3053225536 + 151905625 = 55256^2 + 12325^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3205131161 is a prime.

It is not a weakly prime, because it can be changed into another prime (3205131191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1602565580 + 1602565581.

It is an arithmetic number, because the mean of its divisors is an integer number (1602565581).

Almost surely, 2^3205131161 is an apocalyptic number.

It is an amenable number.

3205131161 is a deficient number, since it is larger than the sum of its proper divisors (1).

3205131161 is an equidigital number, since it uses as much as digits as its factorization.

3205131161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 3205131161 is about 56613.8778127766. The cubic root of 3205131161 is about 1474.3998187883.

Adding to 3205131161 its reverse (1611315023), we get a palindrome (4816446184).

The spelling of 3205131161 in words is "three billion, two hundred five million, one hundred thirty-one thousand, one hundred sixty-one".