331301161 has 2 divisors, whose sum is σ = 331301162. Its totient is φ = 331301160.

The previous prime is 331301153. The next prime is 331301171. The reversal of 331301161 is 161103133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 308213136 + 23088025 = 17556^2 + 4805^2 .

It is an emirp because it is prime and its reverse (161103133) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 331301161 - 2³ = 331301153 is a prime.

It is not a weakly prime, because it can be changed into another prime (331301101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165650580 + 165650581.

It is an arithmetic number, because the mean of its divisors is an integer number (165650581).

Almost surely, 2^331301161 is an apocalyptic number.

It is an amenable number.

331301161 is a deficient number, since it is larger than the sum of its proper divisors (1).

331301161 is an equidigital number, since it uses as much as digits as its factorization.

331301161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 331301161 is about 18201.6801696986. The cubic root of 331301161 is about 691.9493716232.

Adding to 331301161 its reverse (161103133), we get a palindrome (492404294).

The spelling of 331301161 in words is "three hundred thirty-one million, three hundred one thousand, one hundred sixty-one".