424253323421 has 2 divisors, whose sum is σ = 424253323422. Its totient is φ = 424253323420.

The previous prime is 424253323393. The next prime is 424253323423. The reversal of 424253323421 is 124323352424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 323709792025 + 100543531396 = 568955^2 + 317086^2 .

It is a cyclic number.

It is not a de Polignac number, because 424253323421 - 2³⁰ = 423179581597 is a prime.

Together with 424253323423, 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 (424253323423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212126661710 + 212126661711.

It is an arithmetic number, because the mean of its divisors is an integer number (212126661711).

Almost surely, 2^424253323421 is an apocalyptic number.

It is an amenable number.

424253323421 is a deficient number, since it is larger than the sum of its proper divisors (1).

424253323421 is an equidigital number, since it uses as much as digits as its factorization.

424253323421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 35.

Adding to 424253323421 its reverse (124323352424), we get a palindrome (548576675845).

The spelling of 424253323421 in words is "four hundred twenty-four billion, two hundred fifty-three million, three hundred twenty-three thousand, four hundred twenty-one".