442450362506021 has 4 divisors (see below), whose sum is σ = 443703762966732. Its totient is φ = 441196962045312.

The previous prime is 442450362505903. The next prime is 442450362506027. The reversal of 442450362506021 is 120605263054244.

It is a happy number.

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 272953684116100 + 169496678389921 = 16521310^2 + 13019089^2 .

It is a cyclic number.

It is not a de Polignac number, because 442450362506021 - 2³⁸ = 442175484599077 is a prime.

It is a super-2 number, since 2×442450362506021² (a number of 30 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 (442450362506027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 626700229826 + ... + 626700230531.

It is an arithmetic number, because the mean of its divisors is an integer number (110925940741683).

Almost surely, 2^{442450362506021} is an apocalyptic number.

It is an amenable number.

442450362506021 is a deficient number, since it is larger than the sum of its proper divisors (1253400460711).

442450362506021 is a wasteful number, since it uses less digits than its factorization.

442450362506021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253400460710.

The product of its (nonzero) digits is 1382400, while the sum is 44.

The spelling of 442450362506021 in words is "four hundred forty-two trillion, four hundred fifty billion, three hundred sixty-two million, five hundred six thousand, twenty-one".