1331411161 has 2 divisors, whose sum is σ = 1331411162. Its totient is φ = 1331411160.

The previous prime is 1331411119. The next prime is 1331411171. The reversal of 1331411161 is 1611141331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1100978761 + 230432400 = 33181^2 + 15180^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331411161 - 2¹⁹ = 1330886873 is a prime.

It is not a weakly prime, because it can be changed into another prime (1331411171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665705580 + 665705581.

It is an arithmetic number, because the mean of its divisors is an integer number (665705581).

Almost surely, 2^1331411161 is an apocalyptic number.

It is an amenable number.

1331411161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331411161 is an equidigital number, since it uses as much as digits as its factorization.

1331411161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 22.

The square root of 1331411161 is about 36488.5072454328. The cubic root of 1331411161 is about 1100.1132558319.

Adding to 1331411161 its reverse (1611141331), we get a palindrome (2942552492).

The spelling of 1331411161 in words is "one billion, three hundred thirty-one million, four hundred eleven thousand, one hundred sixty-one".