442175688423821 has 8 divisors (see below), whose sum is σ = 482373776560800. Its totient is φ = 401977650000240.

The previous prime is 442175688423773. The next prime is 442175688423869. The reversal of 442175688423821 is 128324886571244.

It is an interprime number because it is at equal distance from previous prime (442175688423773) and next prime (442175688423869).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442175688423821 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 (442175688423881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7568075 + ... + 30685943.

It is an arithmetic number, because the mean of its divisors is an integer number (60296722070100).

Almost surely, 2^{442175688423821} is an apocalyptic number.

It is an amenable number.

442175688423821 is a deficient number, since it is larger than the sum of its proper divisors (40198088136979).

442175688423821 is a wasteful number, since it uses less digits than its factorization.

442175688423821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24856699.

The product of its digits is 165150720, while the sum is 65.

The spelling of 442175688423821 in words is "four hundred forty-two trillion, one hundred seventy-five billion, six hundred eighty-eight million, four hundred twenty-three thousand, eight hundred twenty-one".