42323232421 has 4 divisors (see below), whose sum is σ = 42406382700. Its totient is φ = 42240082144.

The previous prime is 42323232379. The next prime is 42323232433. The reversal of 42323232421 is 12423232324.

42323232421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 33597057025 + 8726175396 = 183295^2 + 93414^2 .

It is a cyclic number.

It is not a de Polignac number, because 42323232421 - 2⁷ = 42323232293 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42323232421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42323232451) 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, 41574376 + ... + 41575393.

It is an arithmetic number, because the mean of its divisors is an integer number (10601595675).

Almost surely, 2^42323232421 is an apocalyptic number.

It is an amenable number.

42323232421 is a deficient number, since it is larger than the sum of its proper divisors (83150279).

42323232421 is an equidigital number, since it uses as much as digits as its factorization.

42323232421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83150278.

The product of its digits is 13824, while the sum is 28.

Adding to 42323232421 its reverse (12423232324), we get a palindrome (54746464745).

The spelling of 42323232421 in words is "forty-two billion, three hundred twenty-three million, two hundred thirty-two thousand, four hundred twenty-one".