8442270181 has 2 divisors, whose sum is σ = 8442270182. Its totient is φ = 8442270180.

The previous prime is 8442270173. The next prime is 8442270251. The reversal of 8442270181 is 1810722448.

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., 4980830625 + 3461439556 = 70575^2 + 58834^2 .

It is a cyclic number.

It is not a de Polignac number, because 8442270181 - 2³ = 8442270173 is a prime.

It is a super-2 number, since 2×8442270181² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8442270181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8442270121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4221135090 + 4221135091.

It is an arithmetic number, because the mean of its divisors is an integer number (4221135091).

Almost surely, 2^8442270181 is an apocalyptic number.

It is an amenable number.

8442270181 is a deficient number, since it is larger than the sum of its proper divisors (1).

8442270181 is an equidigital number, since it uses as much as digits as its factorization.

8442270181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28672, while the sum is 37.

The square root of 8442270181 is about 91881.8272619782. The cubic root of 8442270181 is about 2036.1967924161.

The spelling of 8442270181 in words is "eight billion, four hundred forty-two million, two hundred seventy thousand, one hundred eighty-one".