442112213 has 4 divisors (see below), whose sum is σ = 442229280. Its totient is φ = 441995148.

The previous prime is 442112191. The next prime is 442112239. The reversal of 442112213 is 312211244.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 442112213 - 2¹⁶ = 442046677 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442115213) 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, 52673 + ... + 60486.

It is an arithmetic number, because the mean of its divisors is an integer number (110557320).

Almost surely, 2^442112213 is an apocalyptic number.

It is an amenable number.

442112213 is a deficient number, since it is larger than the sum of its proper divisors (117067).

442112213 is a wasteful number, since it uses less digits than its factorization.

442112213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117066.

The product of its digits is 384, while the sum is 20.

The square root of 442112213 is about 21026.4645863255. The cubic root of 442112213 is about 761.8056173443.

Adding to 442112213 its reverse (312211244), we get a palindrome (754323457).

The spelling of 442112213 in words is "four hundred forty-two million, one hundred twelve thousand, two hundred thirteen".