552221538221 has 8 divisors (see below), whose sum is σ = 552671293944. Its totient is φ = 551771942400.

The previous prime is 552221538151. The next prime is 552221538229. The reversal of 552221538221 is 122835122255.

It can be written as a sum of positive squares in 4 ways, for example, as 32396400100 + 519825138121 = 179990^2 + 720989^2 .

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 552221538221 - 2²⁶ = 552154429357 is a prime.

It is a super-3 number, since 3×552221538221³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (552221538229) 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 7 ways as a sum of consecutive naturals, for example, 7428191 + ... + 7502163.

It is an arithmetic number, because the mean of its divisors is an integer number (69083911743).

Almost surely, 2^552221538221 is an apocalyptic number.

It is an amenable number.

552221538221 is a deficient number, since it is larger than the sum of its proper divisors (449755723).

552221538221 is a wasteful number, since it uses less digits than its factorization.

552221538221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79951.

The product of its digits is 96000, while the sum is 38.

The spelling of 552221538221 in words is "five hundred fifty-two billion, two hundred twenty-one million, five hundred thirty-eight thousand, two hundred twenty-one".