22554771181 has 2 divisors, whose sum is σ = 22554771182. Its totient is φ = 22554771180.

The previous prime is 22554771179. The next prime is 22554771269. The reversal of 22554771181 is 18117745522.

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., 22240949956 + 313821225 = 149134^2 + 17715^2 .

It is a cyclic number.

It is not a de Polignac number, because 22554771181 - 2¹ = 22554771179 is a prime.

It is a super-2 number, since 2×22554771181² (a number of 22 digits) contains 22 as substring.

Together with 22554771179, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22554771581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11277385590 + 11277385591.

It is an arithmetic number, because the mean of its divisors is an integer number (11277385591).

Almost surely, 2^22554771181 is an apocalyptic number.

It is an amenable number.

22554771181 is a deficient number, since it is larger than the sum of its proper divisors (1).

22554771181 is an equidigital number, since it uses as much as digits as its factorization.

22554771181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 156800, while the sum is 43.

The spelling of 22554771181 in words is "twenty-two billion, five hundred fifty-four million, seven hundred seventy-one thousand, one hundred eighty-one".