542431221812 has 6 divisors (see below), whose sum is σ = 949254638178. Its totient is φ = 271215610904.

The previous prime is 542431221809. The next prime is 542431221821. The reversal of 542431221812 is 218122134245.

It can be written as a sum of positive squares in only one way, i.e., 487265425936 + 55165795876 = 698044^2 + 234874^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67803902723 + ... + 67803902730.

It is an arithmetic number, because the mean of its divisors is an integer number (158209106363).

Almost surely, 2^542431221812 is an apocalyptic number.

It is an amenable number.

542431221812 is a deficient number, since it is larger than the sum of its proper divisors (406823416366).

542431221812 is a wasteful number, since it uses less digits than its factorization.

542431221812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135607805457 (or 135607805455 counting only the distinct ones).

The product of its digits is 30720, while the sum is 35.

The spelling of 542431221812 in words is "five hundred forty-two billion, four hundred thirty-one million, two hundred twenty-one thousand, eight hundred twelve".