442235381447 has 2 divisors, whose sum is σ = 442235381448. Its totient is φ = 442235381446.

The previous prime is 442235381407. The next prime is 442235381461. The reversal of 442235381447 is 744183532244.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 442235381447 - 2¹⁸ = 442235119303 is a prime.

It is a super-3 number, since 3×442235381447³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442235381407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221117690723 + 221117690724.

It is an arithmetic number, because the mean of its divisors is an integer number (221117690724).

Almost surely, 2^442235381447 is an apocalyptic number.

442235381447 is a deficient number, since it is larger than the sum of its proper divisors (1).

442235381447 is an equidigital number, since it uses as much as digits as its factorization.

442235381447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2580480, while the sum is 47.

The spelling of 442235381447 in words is "four hundred forty-two billion, two hundred thirty-five million, three hundred eighty-one thousand, four hundred forty-seven".