442031123 has 4 divisors (see below), whose sum is σ = 442383480. Its totient is φ = 441678768.

The previous prime is 442031113. The next prime is 442031129. The reversal of 442031123 is 321130244.

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 442031123 - 2²⁰ = 440982547 is a prime.

It is a super-2 number, since 2×442031123² = 390783027401282258, 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 = 442031095 and 442031104.

It is not an unprimeable number, because it can be changed into a prime (442031129) 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, 174290 + ... + 176807.

It is an arithmetic number, because the mean of its divisors is an integer number (110595870).

Almost surely, 2^442031123 is an apocalyptic number.

442031123 is a deficient number, since it is larger than the sum of its proper divisors (352357).

442031123 is a wasteful number, since it uses less digits than its factorization.

442031123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352356.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 442031123 is about 21024.5362136719. The cubic root of 442031123 is about 761.7590389773.

Adding to 442031123 its reverse (321130244), we get a palindrome (763161367).

The spelling of 442031123 in words is "four hundred forty-two million, thirty-one thousand, one hundred twenty-three".