442140211 has 4 divisors (see below), whose sum is σ = 442183000. Its totient is φ = 442097424.

The previous prime is 442140173. The next prime is 442140311. The reversal of 442140211 is 112041244.

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 442140211 - 2¹¹ = 442138163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442140311) 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, 4780 + ... + 30118.

It is an arithmetic number, because the mean of its divisors is an integer number (110545750).

Almost surely, 2^442140211 is an apocalyptic number.

442140211 is a deficient number, since it is larger than the sum of its proper divisors (42789).

442140211 is a wasteful number, since it uses less digits than its factorization.

442140211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42788.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 442140211 is about 21027.1303558046. The cubic root of 442140211 is about 761.8216981663.

Adding to 442140211 its reverse (112041244), we get a palindrome (554181455).

The spelling of 442140211 in words is "four hundred forty-two million, one hundred forty thousand, two hundred eleven".