442415231021 has 16 divisors (see below), whose sum is σ = 486383664000. Its totient is φ = 400547809728.

The previous prime is 442415231003. The next prime is 442415231033. The reversal of 442415231021 is 120132514244.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442415231021 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 (402415231021) 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 15 ways as a sum of consecutive naturals, for example, 34955 + ... + 941303.

It is an arithmetic number, because the mean of its divisors is an integer number (30398979000).

Almost surely, 2^442415231021 is an apocalyptic number.

It is an amenable number.

442415231021 is a deficient number, since it is larger than the sum of its proper divisors (43968432979).

442415231021 is a wasteful number, since it uses less digits than its factorization.

442415231021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907508.

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 442415231021 its reverse (120132514244), we get a palindrome (562547745265).

The spelling of 442415231021 in words is "four hundred forty-two billion, four hundred fifteen million, two hundred thirty-one thousand, twenty-one".