424432332221 has 4 divisors (see below), whose sum is σ = 424587747744. Its totient is φ = 424276916700.

The previous prime is 424432332211. The next prime is 424432332229. The reversal of 424432332221 is 122233234424.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 424432332221 - 2¹⁸ = 424432070077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (424432332229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77703665 + ... + 77709126.

It is an arithmetic number, because the mean of its divisors is an integer number (106146936936).

Almost surely, 2^424432332221 is an apocalyptic number.

It is an amenable number.

424432332221 is a deficient number, since it is larger than the sum of its proper divisors (155415523).

424432332221 is a wasteful number, since it uses less digits than its factorization.

424432332221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155415522.

The product of its digits is 55296, while the sum is 32.

Adding to 424432332221 its reverse (122233234424), we get a palindrome (546665566645).

The spelling of 424432332221 in words is "four hundred twenty-four billion, four hundred thirty-two million, three hundred thirty-two thousand, two hundred twenty-one".