24343440221 has 2 divisors, whose sum is σ = 24343440222. Its totient is φ = 24343440220.

The previous prime is 24343440181. The next prime is 24343440223. The reversal of 24343440221 is 12204434342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12185952100 + 12157488121 = 110390^2 + 110261^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-24343440221 is a prime.

Together with 24343440223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24343440223) 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, 12171720110 + 12171720111.

It is an arithmetic number, because the mean of its divisors is an integer number (12171720111).

Almost surely, 2^24343440221 is an apocalyptic number.

It is an amenable number.

24343440221 is a deficient number, since it is larger than the sum of its proper divisors (1).

24343440221 is an equidigital number, since it uses as much as digits as its factorization.

24343440221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 24343440221 its reverse (12204434342), we get a palindrome (36547874563).

The spelling of 24343440221 in words is "twenty-four billion, three hundred forty-three million, four hundred forty thousand, two hundred twenty-one".