442528331 has 4 divisors (see below), whose sum is σ = 505746672. Its totient is φ = 379309992.

The previous prime is 442528327. The next prime is 442528391. The reversal of 442528331 is 133825244.

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 442528331 - 2² = 442528327 is a prime.

It is a super-2 number, since 2×442528331² = 391662647475291122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442528321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31609160 + ... + 31609173.

It is an arithmetic number, because the mean of its divisors is an integer number (126436668).

Almost surely, 2^442528331 is an apocalyptic number.

442528331 is a deficient number, since it is larger than the sum of its proper divisors (63218341).

442528331 is an equidigital number, since it uses as much as digits as its factorization.

442528331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63218340.

The product of its digits is 23040, while the sum is 32.

The square root of 442528331 is about 21036.3573605318. The cubic root of 442528331 is about 762.0445473551.

The spelling of 442528331 in words is "four hundred forty-two million, five hundred twenty-eight thousand, three hundred thirty-one".