442123331 has 8 divisors (see below), whose sum is σ = 501192720. Its totient is φ = 386633952.

The previous prime is 442123307. The next prime is 442123343. The reversal of 442123331 is 133321244.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442123331 is a prime.

It is a super-2 number, since 2×442123331² = 390946079629071122, 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 = 442123297 and 442123306.

It is not an unprimeable number, because it can be changed into a prime (442123351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 894740 + ... + 895233.

It is an arithmetic number, because the mean of its divisors is an integer number (62649090).

Almost surely, 2^442123331 is an apocalyptic number.

442123331 is a deficient number, since it is larger than the sum of its proper divisors (59069389).

442123331 is a wasteful number, since it uses less digits than its factorization.

442123331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1790005.

The product of its digits is 1728, while the sum is 23.

The square root of 442123331 is about 21026.7289657712. The cubic root of 442123331 is about 761.8120031166.

Adding to 442123331 its reverse (133321244), we get a palindrome (575444575).

The spelling of 442123331 in words is "four hundred forty-two million, one hundred twenty-three thousand, three hundred thirty-one".