424144222181 has 2 divisors, whose sum is σ = 424144222182. Its totient is φ = 424144222180.

The previous prime is 424144222141. The next prime is 424144222247. The reversal of 424144222181 is 181222441424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 420726065956 + 3418156225 = 648634^2 + 58465^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-424144222181 is a prime.

It is a super-2 number, since 2×424144222181² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (424144222141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212072111090 + 212072111091.

It is an arithmetic number, because the mean of its divisors is an integer number (212072111091).

Almost surely, 2^424144222181 is an apocalyptic number.

It is an amenable number.

424144222181 is a deficient number, since it is larger than the sum of its proper divisors (1).

424144222181 is an equidigital number, since it uses as much as digits as its factorization.

424144222181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32768, while the sum is 35.

The spelling of 424144222181 in words is "four hundred twenty-four billion, one hundred forty-four million, two hundred twenty-two thousand, one hundred eighty-one".