22222629581 has 2 divisors, whose sum is σ = 22222629582. Its totient is φ = 22222629580.

The previous prime is 22222629553. The next prime is 22222629641. The reversal of 22222629581 is 18592622222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21995856100 + 226773481 = 148310^2 + 15059^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22222629581 is a prime.

It is a super-2 number, since 2×22222629581² (a number of 21 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 (22222629181) 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, 11111314790 + 11111314791.

It is an arithmetic number, because the mean of its divisors is an integer number (11111314791).

Almost surely, 2^22222629581 is an apocalyptic number.

It is an amenable number.

22222629581 is a deficient number, since it is larger than the sum of its proper divisors (1).

22222629581 is an equidigital number, since it uses as much as digits as its factorization.

22222629581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138240, while the sum is 41.

The spelling of 22222629581 in words is "twenty-two billion, two hundred twenty-two million, six hundred twenty-nine thousand, five hundred eighty-one".