4243240221223 has 2 divisors, whose sum is σ = 4243240221224. Its totient is φ = 4243240221222.

The previous prime is 4243240221179. The next prime is 4243240221271. The reversal of 4243240221223 is 3221220423424.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4243240221223 is a prime.

It is a super-2 number, since 2×4243240221223² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4243240261223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2121620110611 + 2121620110612.

It is an arithmetic number, because the mean of its divisors is an integer number (2121620110612).

Almost surely, 2^{4243240221223} is an apocalyptic number.

4243240221223 is a deficient number, since it is larger than the sum of its proper divisors (1).

4243240221223 is an equidigital number, since it uses as much as digits as its factorization.

4243240221223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36864, while the sum is 31.

Adding to 4243240221223 its reverse (3221220423424), we get a palindrome (7464460644647).

The spelling of 4243240221223 in words is "four trillion, two hundred forty-three billion, two hundred forty million, two hundred twenty-one thousand, two hundred twenty-three".