442310381 has 2 divisors, whose sum is σ = 442310382. Its totient is φ = 442310380.

The previous prime is 442310377. The next prime is 442310389. The reversal of 442310381 is 183013244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 358496356 + 83814025 = 18934^2 + 9155^2 .

It is a cyclic number.

It is not a de Polignac number, because 442310381 - 2² = 442310377 is a prime.

It is a super-2 number, since 2×442310381² = 391276946280730322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 442310381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442310389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221155190 + 221155191.

It is an arithmetic number, because the mean of its divisors is an integer number (221155191).

Almost surely, 2^442310381 is an apocalyptic number.

It is an amenable number.

442310381 is a deficient number, since it is larger than the sum of its proper divisors (1).

442310381 is an equidigital number, since it uses as much as digits as its factorization.

442310381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 442310381 is about 21031.1764055176. The cubic root of 442310381 is about 761.9194217443.

The spelling of 442310381 in words is "four hundred forty-two million, three hundred ten thousand, three hundred eighty-one".