442131111 has 12 divisors (see below), whose sum is σ = 649104040. Its totient is φ = 289921680.

The previous prime is 442131103. The next prime is 442131113. The reversal of 442131111 is 111131244.

It is not a de Polignac number, because 442131111 - 2³ = 442131103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442131113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 402121 + ... + 403218.

Almost surely, 2^442131111 is an apocalyptic number.

442131111 is a deficient number, since it is larger than the sum of its proper divisors (206972929).

442131111 is a wasteful number, since it uses less digits than its factorization.

442131111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805406 (or 805403 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

The square root of 442131111 is about 21026.9139675797. The cubic root of 442131111 is about 761.8164716003.

Adding to 442131111 its reverse (111131244), we get a palindrome (553262355).

The spelling of 442131111 in words is "four hundred forty-two million, one hundred thirty-one thousand, one hundred eleven".