442111231 has 4 divisors (see below), whose sum is σ = 468117792. Its totient is φ = 416104672.

The previous prime is 442111217. The next prime is 442111253. The reversal of 442111231 is 132111244.

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 442111231 - 2⁵ = 442111199 is a prime.

It is a super-2 number, since 2×442111231² = 390924681152670722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 442111199 and 442111208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442115231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13003255 + ... + 13003288.

It is an arithmetic number, because the mean of its divisors is an integer number (117029448).

Almost surely, 2^442111231 is an apocalyptic number.

442111231 is a deficient number, since it is larger than the sum of its proper divisors (26006561).

442111231 is a wasteful number, since it uses less digits than its factorization.

442111231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26006560.

The product of its digits is 192, while the sum is 19.

The square root of 442111231 is about 21026.4412347882. The cubic root of 442111231 is about 761.8050533142.

Adding to 442111231 its reverse (132111244), we get a palindrome (574222475).

The spelling of 442111231 in words is "four hundred forty-two million, one hundred eleven thousand, two hundred thirty-one".