22221257543 has 2 divisors, whose sum is σ = 22221257544. Its totient is φ = 22221257542.

The previous prime is 22221257519. The next prime is 22221257563. The reversal of 22221257543 is 34575212222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22221257543 - 2⁸ = 22221257287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22221257503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110628771 + 11110628772.

It is an arithmetic number, because the mean of its divisors is an integer number (11110628772).

Almost surely, 2^22221257543 is an apocalyptic number.

22221257543 is a deficient number, since it is larger than the sum of its proper divisors (1).

22221257543 is an equidigital number, since it uses as much as digits as its factorization.

22221257543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 67200, while the sum is 35.

Adding to 22221257543 its reverse (34575212222), we get a palindrome (56796469765).

The spelling of 22221257543 in words is "twenty-two billion, two hundred twenty-one million, two hundred fifty-seven thousand, five hundred forty-three".