442358027821 has 4 divisors (see below), whose sum is σ = 442370787552. Its totient is φ = 442345268092.

The previous prime is 442358027743. The next prime is 442358027827. The reversal of 442358027821 is 128720853244.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 442358027821 - 2²³ = 442349639213 is a prime.

It is a super-2 number, since 2×442358027821² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442358027827) 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, 6327721 + ... + 6397246.

It is an arithmetic number, because the mean of its divisors is an integer number (110592696888).

Almost surely, 2^442358027821 is an apocalyptic number.

It is an amenable number.

442358027821 is a deficient number, since it is larger than the sum of its proper divisors (12759731).

442358027821 is a wasteful number, since it uses less digits than its factorization.

442358027821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12759730.

The product of its (nonzero) digits is 860160, while the sum is 46.

The spelling of 442358027821 in words is "four hundred forty-two billion, three hundred fifty-eight million, twenty-seven thousand, eight hundred twenty-one".