42311310161 has 2 divisors, whose sum is σ = 42311310162. Its totient is φ = 42311310160.

The previous prime is 42311310103. The next prime is 42311310193. The reversal of 42311310161 is 16101311324.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38742442561 + 3568867600 = 196831^2 + 59740^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42311310161 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 (42311310361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21155655080 + 21155655081.

It is an arithmetic number, because the mean of its divisors is an integer number (21155655081).

Almost surely, 2^42311310161 is an apocalyptic number.

It is an amenable number.

42311310161 is a deficient number, since it is larger than the sum of its proper divisors (1).

42311310161 is an equidigital number, since it uses as much as digits as its factorization.

42311310161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 42311310161 its reverse (16101311324), we get a palindrome (58412621485).

The spelling of 42311310161 in words is "forty-two billion, three hundred eleven million, three hundred ten thousand, one hundred sixty-one".