423440330421 has 32 divisors (see below), whose sum is σ = 576987320448. Its totient is φ = 276148304640.

The previous prime is 423440330399. The next prime is 423440330429. The reversal of 423440330421 is 124033044324.

It is a happy number.

It is not a de Polignac number, because 423440330421 - 2¹¹ = 423440328373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423440330429) 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 31 ways as a sum of consecutive naturals, for example, 25690635 + ... + 25707111.

It is an arithmetic number, because the mean of its divisors is an integer number (18030853764).

Almost surely, 2^423440330421 is an apocalyptic number.

It is an amenable number.

423440330421 is a deficient number, since it is larger than the sum of its proper divisors (153546990027).

423440330421 is a wasteful number, since it uses less digits than its factorization.

423440330421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17301.

The product of its (nonzero) digits is 27648, while the sum is 30.

Adding to 423440330421 its reverse (124033044324), we get a palindrome (547473374745).

The spelling of 423440330421 in words is "four hundred twenty-three billion, four hundred forty million, three hundred thirty thousand, four hundred twenty-one".