221349548484 has 81 divisors (see below), whose sum is σ = 590664066447. Its totient is φ = 69882920208.

The previous prime is 221349548471. The next prime is 221349548489. The reversal of 221349548484 is 484845943122.

The square root of 221349548484 is 470478.

It is a perfect power (a square), and thus also a powerful number.

221349548484 is a `hidden beast` number, since 2 + 2 + 1 + 34 + 95 + 48 + 484 = 666.

It is a super-2 number, since 2×221349548484² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221349548484.

It is not an unprimeable number, because it can be changed into a prime (221349548489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 53632429 + ... + 53636555.

Almost surely, 2^221349548484 is an apocalyptic number.

221349548484 is the 470478-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221349548484

221349548484 is an abundant number, since it is smaller than the sum of its proper divisors (369314517963).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221349548484 is an equidigital number, since it uses as much as digits as its factorization.

221349548484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8302 (or 4151 counting only the distinct ones).

The product of its digits is 8847360, while the sum is 54.

The spelling of 221349548484 in words is "two hundred twenty-one billion, three hundred forty-nine million, five hundred forty-eight thousand, four hundred eighty-four".