442312219 has 2 divisors, whose sum is σ = 442312220. Its totient is φ = 442312218.

The previous prime is 442312193. The next prime is 442312237. The reversal of 442312219 is 912213244.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 442312219 - 2⁵ = 442312187 is a prime.

It is a super-2 number, since 2×442312219² = 391280198153407922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (442312279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221156109 + 221156110.

It is an arithmetic number, because the mean of its divisors is an integer number (221156110).

Almost surely, 2^442312219 is an apocalyptic number.

442312219 is a deficient number, since it is larger than the sum of its proper divisors (1).

442312219 is an equidigital number, since it uses as much as digits as its factorization.

442312219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 28.

The square root of 442312219 is about 21031.2201025048. The cubic root of 442312219 is about 761.9204771163.

The spelling of 442312219 in words is "four hundred forty-two million, three hundred twelve thousand, two hundred nineteen".