442034231 has 2 divisors, whose sum is σ = 442034232. Its totient is φ = 442034230.

The previous prime is 442034209. The next prime is 442034233. The reversal of 442034231 is 132430244.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442034231 is a prime.

It is a super-2 number, since 2×442034231² = 390788522751522722, which contains 22 as substring.

Together with 442034233, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 442034197 and 442034206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442034233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221017115 + 221017116.

It is an arithmetic number, because the mean of its divisors is an integer number (221017116).

Almost surely, 2^442034231 is an apocalyptic number.

442034231 is a deficient number, since it is larger than the sum of its proper divisors (1).

442034231 is an equidigital number, since it uses as much as digits as its factorization.

442034231 is an odious number, because the sum of its binary digits is odd.

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

The square root of 442034231 is about 21024.6101271819. The cubic root of 442034231 is about 761.7608243278.

Adding to 442034231 its reverse (132430244), we get a palindrome (574464475).

The spelling of 442034231 in words is "four hundred forty-two million, thirty-four thousand, two hundred thirty-one".