442423211 has 2 divisors, whose sum is σ = 442423212. Its totient is φ = 442423210.

The previous prime is 442423153. The next prime is 442423229. The reversal of 442423211 is 112324244.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442423211 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (442423231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221211605 + 221211606.

It is an arithmetic number, because the mean of its divisors is an integer number (221211606).

Almost surely, 2^442423211 is an apocalyptic number.

442423211 is a deficient number, since it is larger than the sum of its proper divisors (1).

442423211 is an equidigital number, since it uses as much as digits as its factorization.

442423211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1536, while the sum is 23.

The square root of 442423211 is about 21033.8586807081. The cubic root of 442423211 is about 761.9842028446.

Adding to 442423211 its reverse (112324244), we get a palindrome (554747455).

The spelling of 442423211 in words is "four hundred forty-two million, four hundred twenty-three thousand, two hundred eleven".