442530131 has 2 divisors, whose sum is σ = 442530132. Its totient is φ = 442530130.

The previous prime is 442530107. The next prime is 442530133. The reversal of 442530131 is 131035244.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442530131 is a prime.

It is a super-2 number, since 2×442530131² = 391665833685754322, which contains 22 as substring.

Together with 442530133, 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 = 442530097 and 442530106.

It is not a weakly prime, because it can be changed into another prime (442530133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221265065 + 221265066.

It is an arithmetic number, because the mean of its divisors is an integer number (221265066).

Almost surely, 2^442530131 is an apocalyptic number.

442530131 is a deficient number, since it is larger than the sum of its proper divisors (1).

442530131 is an equidigital number, since it uses as much as digits as its factorization.

442530131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 442530131 is about 21036.4001435607. The cubic root of 442530131 is about 762.0455805683.

Adding to 442530131 its reverse (131035244), we get a palindrome (573565375).

The spelling of 442530131 in words is "four hundred forty-two million, five hundred thirty thousand, one hundred thirty-one".