220540544 has 64 divisors (see below), whose sum is σ = 512904960. Its totient is φ = 92488704.

The previous prime is 220540531. The next prime is 220540547. The reversal of 220540544 is 445045022.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (220540547) 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, 39494 + ... + 44730.

It is an arithmetic number, because the mean of its divisors is an integer number (8014140).

Almost surely, 2^220540544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220540544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (256452480).

220540544 is an abundant number, since it is smaller than the sum of its proper divisors (292364416).

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

220540544 is an equidigital number, since it uses as much as digits as its factorization.

220540544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5305 (or 5293 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 26.

The square root of 220540544 is about 14850.6075296602. The cubic root of 220540544 is about 604.1750877579.

Adding to 220540544 its reverse (445045022), we get a palindrome (665585566).

The spelling of 220540544 in words is "two hundred twenty million, five hundred forty thousand, five hundred forty-four".