442133431 has 4 divisors (see below), whose sum is σ = 442332792. Its totient is φ = 441934072.

The previous prime is 442133423. The next prime is 442133437. The reversal of 442133431 is 134331244.

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 442133431 - 2³ = 442133423 is a prime.

It is a super-4 number, since 4×442133431⁴ (a number of 36 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 442133396 and 442133405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442133437) 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, 96316 + ... + 100801.

It is an arithmetic number, because the mean of its divisors is an integer number (110583198).

Almost surely, 2^442133431 is an apocalyptic number.

442133431 is a deficient number, since it is larger than the sum of its proper divisors (199361).

442133431 is a wasteful number, since it uses less digits than its factorization.

442133431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199360.

The product of its digits is 3456, while the sum is 25.

The square root of 442133431 is about 21026.9691348991. The cubic root of 442133431 is about 761.8178040942.

Adding to 442133431 its reverse (134331244), we get a palindrome (576464675).

The spelling of 442133431 in words is "four hundred forty-two million, one hundred thirty-three thousand, four hundred thirty-one".