542205521 has 8 divisors (see below), whose sum is σ = 636996864. Its totient is φ = 454997520.

The previous prime is 542205509. The next prime is 542205541. The reversal of 542205521 is 125502245.

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 542205521 - 2¹⁸ = 541943377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (542205541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1895681 + ... + 1895966.

It is an arithmetic number, because the mean of its divisors is an integer number (79624608).

Almost surely, 2^542205521 is an apocalyptic number.

It is an amenable number.

542205521 is a deficient number, since it is larger than the sum of its proper divisors (94791343).

542205521 is a wasteful number, since it uses less digits than its factorization.

542205521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3791671.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 542205521 is about 23285.3069767182. The cubic root of 542205521 is about 815.4324281273.

Adding to 542205521 its reverse (125502245), we get a palindrome (667707766).

The spelling of 542205521 in words is "five hundred forty-two million, two hundred five thousand, five hundred twenty-one".