424223344421 has 4 divisors (see below), whose sum is σ = 425151623532. Its totient is φ = 423295065312.

The previous prime is 424223344397. The next prime is 424223344429. The reversal of 424223344421 is 124443322424.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 177840167521 + 246383176900 = 421711^2 + 496370^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-424223344421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (424223344429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 464138870 + ... + 464139783.

It is an arithmetic number, because the mean of its divisors is an integer number (106287905883).

Almost surely, 2^424223344421 is an apocalyptic number.

It is an amenable number.

424223344421 is a deficient number, since it is larger than the sum of its proper divisors (928279111).

424223344421 is an equidigital number, since it uses as much as digits as its factorization.

424223344421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928279110.

The product of its digits is 147456, while the sum is 35.

Adding to 424223344421 its reverse (124443322424), we get a palindrome (548666666845).

The spelling of 424223344421 in words is "four hundred twenty-four billion, two hundred twenty-three million, three hundred forty-four thousand, four hundred twenty-one".