24424164221 has 2 divisors, whose sum is σ = 24424164222. Its totient is φ = 24424164220.

The previous prime is 24424164203. The next prime is 24424164241. The reversal of 24424164221 is 12246142442.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24214783321 + 209380900 = 155611^2 + 14470^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-24424164221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24424164241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12212082110 + 12212082111.

It is an arithmetic number, because the mean of its divisors is an integer number (12212082111).

Almost surely, 2^24424164221 is an apocalyptic number.

It is an amenable number.

24424164221 is a deficient number, since it is larger than the sum of its proper divisors (1).

24424164221 is an equidigital number, since it uses as much as digits as its factorization.

24424164221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24576, while the sum is 32.

The spelling of 24424164221 in words is "twenty-four billion, four hundred twenty-four million, one hundred sixty-four thousand, two hundred twenty-one".