42444031031161 has 2 divisors, whose sum is σ = 42444031031162. Its totient is φ = 42444031031160.

The previous prime is 42444031031047. The next prime is 42444031031177. The reversal of 42444031031161 is 16113013044424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42031635878761 + 412395152400 = 6483181^2 + 642180^2 .

It is a cyclic number.

It is not a de Polignac number, because 42444031031161 - 2¹³ = 42444031022969 is a prime.

It is not a weakly prime, because it can be changed into another prime (42444031031561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21222015515580 + 21222015515581.

It is an arithmetic number, because the mean of its divisors is an integer number (21222015515581).

Almost surely, 2^{42444031031161} is an apocalyptic number.

It is an amenable number.

42444031031161 is a deficient number, since it is larger than the sum of its proper divisors (1).

42444031031161 is an equidigital number, since it uses as much as digits as its factorization.

42444031031161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 34.

Adding to 42444031031161 its reverse (16113013044424), we get a palindrome (58557044075585).

The spelling of 42444031031161 in words is "forty-two trillion, four hundred forty-four billion, thirty-one million, thirty-one thousand, one hundred sixty-one".