113331161 has 2 divisors, whose sum is σ = 113331162. Its totient is φ = 113331160.

The previous prime is 113331151. The next prime is 113331247. The reversal of 113331161 is 161133311.

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., 111936400 + 1394761 = 10580^2 + 1181^2 .

It is a cyclic number.

It is not a de Polignac number, because 113331161 - 2¹⁰ = 113330137 is a prime.

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 (113331121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56665580 + 56665581.

It is an arithmetic number, because the mean of its divisors is an integer number (56665581).

Almost surely, 2^113331161 is an apocalyptic number.

It is an amenable number.

113331161 is a deficient number, since it is larger than the sum of its proper divisors (1).

113331161 is an equidigital number, since it uses as much as digits as its factorization.

113331161 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 113331161 is about 10645.7109203660. The cubic root of 113331161 is about 483.9306314649.

Adding to 113331161 its reverse (161133311), we get a palindrome (274464472).

The spelling of 113331161 in words is "one hundred thirteen million, three hundred thirty-one thousand, one hundred sixty-one".