442320255 has 48 divisors (see below), whose sum is σ = 831841920. Its totient is φ = 216129024.

The previous prime is 442320253. The next prime is 442320257. The reversal of 442320255 is 552023244.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (442320253) and next prime (442320257).

It is not a de Polignac number, because 442320255 - 2¹ = 442320253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442320253) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 77386 + ... + 82904.

It is an arithmetic number, because the mean of its divisors is an integer number (17330040).

Almost surely, 2^442320255 is an apocalyptic number.

442320255 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

442320255 is a deficient number, since it is larger than the sum of its proper divisors (389521665).

442320255 is a wasteful number, since it uses less digits than its factorization.

442320255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5680 (or 5677 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 442320255 is about 21031.4111509428. The cubic root of 442320255 is about 761.9250913198.

Adding to 442320255 its reverse (552023244), we get a palindrome (994343499).

The spelling of 442320255 in words is "four hundred forty-two million, three hundred twenty thousand, two hundred fifty-five".