442441421343421 has 4 divisors (see below), whose sum is σ = 443837135606652. Its totient is φ = 441045707080192.

The previous prime is 442441421343401. The next prime is 442441421343463. The reversal of 442441421343421 is 124343124144244.

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 205708424966521 + 236732996376900 = 14342539^2 + 15386130^2 .

It is a cyclic number.

It is not a de Polignac number, because 442441421343421 - 2⁷ = 442441421343293 is a prime.

It is a super-2 number, since 2×442441421343421² (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 (442441421343401) 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, 697857131140 + ... + 697857131773.

It is an arithmetic number, because the mean of its divisors is an integer number (110959283901663).

Almost surely, 2^{442441421343421} is an apocalyptic number.

It is an amenable number.

442441421343421 is a deficient number, since it is larger than the sum of its proper divisors (1395714263231).

442441421343421 is a wasteful number, since it uses less digits than its factorization.

442441421343421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1395714263230.

The product of its digits is 1179648, while the sum is 43.

Adding to 442441421343421 its reverse (124343124144244), we get a palindrome (566784545487665).

The spelling of 442441421343421 in words is "four hundred forty-two trillion, four hundred forty-one billion, four hundred twenty-one million, three hundred forty-three thousand, four hundred twenty-one".