442413232421 has 4 divisors (see below), whose sum is σ = 448013400000. Its totient is φ = 436813064844.

The previous prime is 442413232409. The next prime is 442413232439. The reversal of 442413232421 is 124232314244.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-442413232421 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 (442413232451) 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, 2800083671 + ... + 2800083828.

It is an arithmetic number, because the mean of its divisors is an integer number (112003350000).

Almost surely, 2^442413232421 is an apocalyptic number.

It is an amenable number.

442413232421 is a deficient number, since it is larger than the sum of its proper divisors (5600167579).

442413232421 is an equidigital number, since it uses as much as digits as its factorization.

442413232421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5600167578.

The product of its digits is 36864, while the sum is 32.

Adding to 442413232421 its reverse (124232314244), we get a palindrome (566645546665).

The spelling of 442413232421 in words is "four hundred forty-two billion, four hundred thirteen million, two hundred thirty-two thousand, four hundred twenty-one".