426227722181 has 2 divisors, whose sum is σ = 426227722182. Its totient is φ = 426227722180.

The previous prime is 426227722117. The next prime is 426227722243. The reversal of 426227722181 is 181227722624.

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., 416922033025 + 9305689156 = 645695^2 + 96466^2 .

It is a cyclic number.

It is not a de Polignac number, because 426227722181 - 2⁶ = 426227722117 is a prime.

It is a super-2 number, since 2×426227722181² (a number of 24 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 (426227722681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213113861090 + 213113861091.

It is an arithmetic number, because the mean of its divisors is an integer number (213113861091).

Almost surely, 2^426227722181 is an apocalyptic number.

It is an amenable number.

426227722181 is a deficient number, since it is larger than the sum of its proper divisors (1).

426227722181 is an equidigital number, since it uses as much as digits as its factorization.

426227722181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 301056, while the sum is 44.

The spelling of 426227722181 in words is "four hundred twenty-six billion, two hundred twenty-seven million, seven hundred twenty-two thousand, one hundred eighty-one".