442430003021 has 4 divisors (see below), whose sum is σ = 442432739100. Its totient is φ = 442427266944.

The previous prime is 442430003017. The next prime is 442430003039. The reversal of 442430003021 is 120300034244.

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

It can be written as a sum of positive squares in 2 ways, for example, as 400625702500 + 41804300521 = 632950^2 + 204461^2 .

It is a cyclic number.

It is not a de Polignac number, because 442430003021 - 2² = 442430003017 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 (442430003051) 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, 1109156 + ... + 1454333.

It is an arithmetic number, because the mean of its divisors is an integer number (110608184775).

Almost surely, 2^442430003021 is an apocalyptic number.

It is an amenable number.

442430003021 is a deficient number, since it is larger than the sum of its proper divisors (2736079).

442430003021 is a wasteful number, since it uses less digits than its factorization.

442430003021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2736078.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 442430003021 its reverse (120300034244), we get a palindrome (562730037265).

The spelling of 442430003021 in words is "four hundred forty-two billion, four hundred thirty million, three thousand, twenty-one".