331161113 has 2 divisors, whose sum is σ = 331161114. Its totient is φ = 331161112.

The previous prime is 331161097. The next prime is 331161133. The reversal of 331161113 is 311161133.

It is a happy number.

It is an a-pointer prime, because the next prime (331161133) can be obtained adding 331161113 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 283316224 + 47844889 = 16832^2 + 6917^2 .

It is an emirp because it is prime and its reverse (311161133) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 331161113 - 2⁴ = 331161097 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (331161133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165580556 + 165580557.

It is an arithmetic number, because the mean of its divisors is an integer number (165580557).

Almost surely, 2^331161113 is an apocalyptic number.

It is an amenable number.

331161113 is a deficient number, since it is larger than the sum of its proper divisors (1).

331161113 is an equidigital number, since it uses as much as digits as its factorization.

331161113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 162, while the sum is 20.

The square root of 331161113 is about 18197.8326456751. The cubic root of 331161113 is about 691.8518573421.

Adding to 331161113 its sum of digits (20), we get a palindrome (331161133).

The spelling of 331161113 in words is "three hundred thirty-one million, one hundred sixty-one thousand, one hundred thirteen".