144171107981 has 2 divisors, whose sum is σ = 144171107982. Its totient is φ = 144171107980.

The previous prime is 144171107957. The next prime is 144171108023. The reversal of 144171107981 is 189701171441.

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., 87352758025 + 56818349956 = 295555^2 + 238366^2 .

It is an emirp because it is prime and its reverse (189701171441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 144171107981 - 2⁶ = 144171107917 is a prime.

It is a super-2 number, since 2×144171107981² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144171107911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72085553990 + 72085553991.

It is an arithmetic number, because the mean of its divisors is an integer number (72085553991).

Almost surely, 2^144171107981 is an apocalyptic number.

It is an amenable number.

144171107981 is a deficient number, since it is larger than the sum of its proper divisors (1).

144171107981 is an equidigital number, since it uses as much as digits as its factorization.

144171107981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 44.

The spelling of 144171107981 in words is "one hundred forty-four billion, one hundred seventy-one million, one hundred seven thousand, nine hundred eighty-one".