442042331 has 4 divisors (see below), whose sum is σ = 457285200. Its totient is φ = 426799464.

The previous prime is 442042309. The next prime is 442042351. The reversal of 442042331 is 133240244.

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 442042331 - 2²⁶ = 374933467 is a prime.

It is a super-2 number, since 2×442042331² = 390802844791827122, 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 = 442042297 and 442042306.

It is not an unprimeable number, because it can be changed into a prime (442042301) 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, 7621391 + ... + 7621448.

It is an arithmetic number, because the mean of its divisors is an integer number (114321300).

Almost surely, 2^442042331 is an apocalyptic number.

442042331 is a deficient number, since it is larger than the sum of its proper divisors (15242869).

442042331 is a wasteful number, since it uses less digits than its factorization.

442042331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15242868.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 442042331 is about 21024.8027576955. The cubic root of 442042331 is about 761.7654772292.

Adding to 442042331 its reverse (133240244), we get a palindrome (575282575).

The spelling of 442042331 in words is "four hundred forty-two million, forty-two thousand, three hundred thirty-one".