442221545122243 has 4 divisors (see below), whose sum is σ = 442221659061280. Its totient is φ = 442221431183208.

The previous prime is 442221545122219. The next prime is 442221545122283. The reversal of 442221545122243 is 342221545122244.

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

It is a cyclic number.

It is not a de Polignac number, because 442221545122243 - 2¹³ = 442221545114051 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 442221545122243.

It is not an unprimeable number, because it can be changed into a prime (442221545122283) 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, 50934603 + ... + 58981156.

It is an arithmetic number, because the mean of its divisors is an integer number (110555414765320).

Almost surely, 2^{442221545122243} is an apocalyptic number.

442221545122243 is a deficient number, since it is larger than the sum of its proper divisors (113939037).

442221545122243 is a wasteful number, since it uses less digits than its factorization.

442221545122243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113939036.

The product of its digits is 1228800, while the sum is 43.

Subtracting from 442221545122243 its reverse (342221545122244), we obtain a palindrome (99999999999999).

The spelling of 442221545122243 in words is "four hundred forty-two trillion, two hundred twenty-one billion, five hundred forty-five million, one hundred twenty-two thousand, two hundred forty-three".