22001231543 has 2 divisors, whose sum is σ = 22001231544. Its totient is φ = 22001231542.

The previous prime is 22001231503. The next prime is 22001231579. The reversal of 22001231543 is 34513210022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22001231543 - 2¹⁶ = 22001166007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22001231503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11000615771 + 11000615772.

It is an arithmetic number, because the mean of its divisors is an integer number (11000615772).

Almost surely, 2^22001231543 is an apocalyptic number.

22001231543 is a deficient number, since it is larger than the sum of its proper divisors (1).

22001231543 is an equidigital number, since it uses as much as digits as its factorization.

22001231543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 22001231543 its reverse (34513210022), we get a palindrome (56514441565).

The spelling of 22001231543 in words is "twenty-two billion, one million, two hundred thirty-one thousand, five hundred forty-three".