442143271 has 4 divisors (see below), whose sum is σ = 442214392. Its totient is φ = 442072152.

The previous prime is 442143263. The next prime is 442143287. The reversal of 442143271 is 172341244.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 442143271 - 2³ = 442143263 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 (442143371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25236 + ... + 39001.

It is an arithmetic number, because the mean of its divisors is an integer number (110553598).

Almost surely, 2^442143271 is an apocalyptic number.

442143271 is a deficient number, since it is larger than the sum of its proper divisors (71121).

442143271 is an equidigital number, since it uses as much as digits as its factorization.

442143271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71120.

The product of its digits is 5376, while the sum is 28.

The square root of 442143271 is about 21027.2031188173. The cubic root of 442143271 is about 761.8234556548.

The spelling of 442143271 in words is "four hundred forty-two million, one hundred forty-three thousand, two hundred seventy-one".