542420304221 has 4 divisors (see below), whose sum is σ = 542423689500. Its totient is φ = 542416918944.

The previous prime is 542420304211. The next prime is 542420304227. The reversal of 542420304221 is 122403024245.

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 507072168100 + 35348136121 = 712090^2 + 188011^2 .

It is a cyclic number.

It is not a de Polignac number, because 542420304221 - 2²⁶ = 542353195357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542420304227) 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 3 ways as a sum of consecutive naturals, for example, 1439696 + ... + 1776953.

It is an arithmetic number, because the mean of its divisors is an integer number (135605922375).

Almost surely, 2^542420304221 is an apocalyptic number.

It is an amenable number.

542420304221 is a deficient number, since it is larger than the sum of its proper divisors (3385279).

542420304221 is a wasteful number, since it uses less digits than its factorization.

542420304221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3385278.

The product of its (nonzero) digits is 15360, while the sum is 29.

Adding to 542420304221 its reverse (122403024245), we get a palindrome (664823328466).

The spelling of 542420304221 in words is "five hundred forty-two billion, four hundred twenty million, three hundred four thousand, two hundred twenty-one".