442111211 has 4 divisors (see below), whose sum is σ = 442153800. Its totient is φ = 442068624.

The previous prime is 442111199. The next prime is 442111217. The reversal of 442111211 is 112111244.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 442111211 - 2²⁶ = 375002347 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 442111211.

It is not an unprimeable number, because it can be changed into a prime (442111217) 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, 5600 + ... + 30258.

It is an arithmetic number, because the mean of its divisors is an integer number (110538450).

Almost surely, 2^442111211 is an apocalyptic number.

442111211 is a deficient number, since it is larger than the sum of its proper divisors (42589).

442111211 is a wasteful number, since it uses less digits than its factorization.

442111211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42588.

The product of its digits is 64, while the sum is 17.

The square root of 442111211 is about 21026.4407591965. The cubic root of 442111211 is about 761.8050418269.

Adding to 442111211 its reverse (112111244), we get a palindrome (554222455).

The spelling of 442111211 in words is "four hundred forty-two million, one hundred eleven thousand, two hundred eleven".