22239807181 has 2 divisors, whose sum is σ = 22239807182. Its totient is φ = 22239807180.

The previous prime is 22239807143. The next prime is 22239807253. The reversal of 22239807181 is 18170893222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20015175625 + 2224631556 = 141475^2 + 47166^2 .

It is a cyclic number.

It is not a de Polignac number, because 22239807181 - 2²⁵ = 22206252749 is a prime.

It is a super-2 number, since 2×22239807181² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22239847181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11119903590 + 11119903591.

It is an arithmetic number, because the mean of its divisors is an integer number (11119903591).

Almost surely, 2^22239807181 is an apocalyptic number.

It is an amenable number.

22239807181 is a deficient number, since it is larger than the sum of its proper divisors (1).

22239807181 is an equidigital number, since it uses as much as digits as its factorization.

22239807181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 43.

The spelling of 22239807181 in words is "twenty-two billion, two hundred thirty-nine million, eight hundred seven thousand, one hundred eighty-one".