442244402421 has 8 divisors (see below), whose sum is σ = 624345038784. Its totient is φ = 277486683840.

The previous prime is 442244402417. The next prime is 442244402423. The reversal of 442244402421 is 124204442244.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 442244402421 - 2² = 442244402417 is a prime.

It is a super-2 number, since 2×442244402421² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442244402423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4335729385 + ... + 4335729486.

It is an arithmetic number, because the mean of its divisors is an integer number (78043129848).

Almost surely, 2^442244402421 is an apocalyptic number.

It is an amenable number.

442244402421 is a deficient number, since it is larger than the sum of its proper divisors (182100636363).

442244402421 is a wasteful number, since it uses less digits than its factorization.

442244402421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8671458891.

The product of its (nonzero) digits is 65536, while the sum is 33.

Adding to 442244402421 its reverse (124204442244), we get a palindrome (566448844665).

The spelling of 442244402421 in words is "four hundred forty-two billion, two hundred forty-four million, four hundred two thousand, four hundred twenty-one".