442330435510021 has 4 divisors (see below), whose sum is σ = 443381101628044. Its totient is φ = 441279769392000.

The previous prime is 442330435510009. The next prime is 442330435510039. The reversal of 442330435510021 is 120015534033244.

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 53598344145921 + 388732091364100 = 7321089^2 + 19716290^2 .

It is a cyclic number.

It is not a de Polignac number, because 442330435510021 - 2¹⁵ = 442330435477253 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 (442330435510081) 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 3 ways as a sum of consecutive naturals, for example, 525333058380 + ... + 525333059221.

It is an arithmetic number, because the mean of its divisors is an integer number (110845275407011).

Almost surely, 2^{442330435510021} is an apocalyptic number.

It is an amenable number.

442330435510021 is a deficient number, since it is larger than the sum of its proper divisors (1050666118023).

442330435510021 is a wasteful number, since it uses less digits than its factorization.

442330435510021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050666118022.

The product of its (nonzero) digits is 172800, while the sum is 37.

Adding to 442330435510021 its reverse (120015534033244), we get a palindrome (562345969543265).

The spelling of 442330435510021 in words is "four hundred forty-two trillion, three hundred thirty billion, four hundred thirty-five million, five hundred ten thousand, twenty-one".