542242106521 has 8 divisors (see below), whose sum is σ = 563948331584. Its totient is φ = 520949333520.

The previous prime is 542242106491. The next prime is 542242106587. The reversal of 542242106521 is 125601242245.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 542242106521 - 2²⁵ = 542208552089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (542242106321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103360341 + ... + 103365586.

It is an arithmetic number, because the mean of its divisors is an integer number (70493541448).

Almost surely, 2^542242106521 is an apocalyptic number.

It is an amenable number.

542242106521 is a deficient number, since it is larger than the sum of its proper divisors (21706225063).

542242106521 is a wasteful number, since it uses less digits than its factorization.

542242106521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206726031.

The product of its (nonzero) digits is 38400, while the sum is 34.

Adding to 542242106521 its reverse (125601242245), we get a palindrome (667843348766).

The spelling of 542242106521 in words is "five hundred forty-two billion, two hundred forty-two million, one hundred six thousand, five hundred twenty-one".