442143215 has 8 divisors (see below), whose sum is σ = 532952448. Its totient is φ = 352127520.

The previous prime is 442143197. The next prime is 442143217. The reversal of 442143215 is 512341244.

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

It is not a de Polignac number, because 442143215 - 2⁶ = 442143151 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 (442143217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197156 + ... + 199385.

It is an arithmetic number, because the mean of its divisors is an integer number (66619056).

Almost surely, 2^442143215 is an apocalyptic number.

442143215 is a deficient number, since it is larger than the sum of its proper divisors (90809233).

442143215 is a wasteful number, since it uses less digits than its factorization.

442143215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396769.

The product of its digits is 3840, while the sum is 26.

The square root of 442143215 is about 21027.2017872089. The cubic root of 442143215 is about 761.8234234917.

Adding to 442143215 its reverse (512341244), we get a palindrome (954484459).

The spelling of 442143215 in words is "four hundred forty-two million, one hundred forty-three thousand, two hundred fifteen".