220504544 has 48 divisors (see below), whose sum is σ = 469414512. Its totient is φ = 101357568.

The previous prime is 220504541. The next prime is 220504549. The reversal of 220504544 is 445405022.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220504541) 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, 116792 + ... + 118664.

It is an arithmetic number, because the mean of its divisors is an integer number (9779469).

Almost surely, 2^220504544 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 220504544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234707256).

220504544 is an abundant number, since it is smaller than the sum of its proper divisors (248909968).

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

220504544 is a wasteful number, since it uses less digits than its factorization.

220504544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2179 (or 2171 counting only the distinct ones).

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

The square root of 220504544 is about 14849.3954085680. The cubic root of 220504544 is about 604.1422117368.

Adding to 220504544 its reverse (445405022), we get a palindrome (665909566).

The spelling of 220504544 in words is "two hundred twenty million, five hundred four thousand, five hundred forty-four".