442404522140023 has 4 divisors (see below), whose sum is σ = 442404630648360. Its totient is φ = 442404413631688.

The previous prime is 442404522139999. The next prime is 442404522140027. The reversal of 442404522140023 is 320041225404244.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442404522140023 is a prime.

It is a super-2 number, since 2×442404522140023² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442404522140027) 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, 47889568 + ... + 56375701.

It is an arithmetic number, because the mean of its divisors is an integer number (110601157662090).

Almost surely, 2^{442404522140023} is an apocalyptic number.

442404522140023 is a deficient number, since it is larger than the sum of its proper divisors (108508337).

442404522140023 is a wasteful number, since it uses less digits than its factorization.

442404522140023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108508336.

The product of its (nonzero) digits is 245760, while the sum is 37.

Adding to 442404522140023 its reverse (320041225404244), we get a palindrome (762445747544267).

The spelling of 442404522140023 in words is "four hundred forty-two trillion, four hundred four billion, five hundred twenty-two million, one hundred forty thousand, twenty-three".