543032156221 has 4 divisors (see below), whose sum is σ = 574975224252. Its totient is φ = 511089088192.

The previous prime is 543032156201. The next prime is 543032156237. The reversal of 543032156221 is 122651230345.

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 475429556196 + 67602600025 = 689514^2 + 260005^2 .

It is a cyclic number.

It is not a de Polignac number, because 543032156221 - 2²¹ = 543030059069 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 (543032156201) 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 3 ways as a sum of consecutive naturals, for example, 15971533990 + ... + 15971534023.

It is an arithmetic number, because the mean of its divisors is an integer number (143743806063).

Almost surely, 2^543032156221 is an apocalyptic number.

It is an amenable number.

543032156221 is a deficient number, since it is larger than the sum of its proper divisors (31943068031).

543032156221 is a wasteful number, since it uses less digits than its factorization.

543032156221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31943068030.

The product of its (nonzero) digits is 43200, while the sum is 34.

Adding to 543032156221 its reverse (122651230345), we get a palindrome (665683386566).

The spelling of 543032156221 in words is "five hundred forty-three billion, thirty-two million, one hundred fifty-six thousand, two hundred twenty-one".