442255663 has 8 divisors (see below), whose sum is σ = 474867360. Its totient is φ = 410376960.

The previous prime is 442255651. The next prime is 442255679. The reversal of 442255663 is 366552244.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 442255663 - 2⁵ = 442255631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442255603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181998 + ... + 184411.

It is an arithmetic number, because the mean of its divisors is an integer number (59358420).

Almost surely, 2^442255663 is an apocalyptic number.

442255663 is a deficient number, since it is larger than the sum of its proper divisors (32611697).

442255663 is a wasteful number, since it uses less digits than its factorization.

442255663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366497.

The product of its digits is 172800, while the sum is 37.

The square root of 442255663 is about 21029.8754870303. The cubic root of 442255663 is about 761.8880015561. Note that the first 3 decimals are identical.

The spelling of 442255663 in words is "four hundred forty-two million, two hundred fifty-five thousand, six hundred sixty-three".