542443104245021 has 16 divisors (see below), whose sum is σ = 621779497996800. Its totient is φ = 463567862903040.

The previous prime is 542443104244997. The next prime is 542443104245047. The reversal of 542443104245021 is 120542401344245.

It is not a de Polignac number, because 542443104245021 - 2¹⁴ = 542443104228637 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 542443104245021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542443104241021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 319030151 + ... + 320725931.

It is an arithmetic number, because the mean of its divisors is an integer number (38861218624800).

Almost surely, 2^{542443104245021} is an apocalyptic number.

It is an amenable number.

542443104245021 is a deficient number, since it is larger than the sum of its proper divisors (79336393751779).

542443104245021 is a wasteful number, since it uses less digits than its factorization.

542443104245021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1831724.

The product of its (nonzero) digits is 614400, while the sum is 41.

Adding to 542443104245021 its reverse (120542401344245), we get a palindrome (662985505589266).

The spelling of 542443104245021 in words is "five hundred forty-two trillion, four hundred forty-three billion, one hundred four million, two hundred forty-five thousand, twenty-one".