220521104 has 40 divisors (see below), whose sum is σ = 456280320. Its totient is φ = 103017600.

The previous prime is 220521097. The next prime is 220521109. The reversal of 220521104 is 401125022.

It is not an unprimeable number, because it can be changed into a prime (220521109) 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, 6719 + ... + 22049.

It is an arithmetic number, because the mean of its divisors is an integer number (11407008).

Almost surely, 2^220521104 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 220521104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228140160).

220521104 is an abundant number, since it is smaller than the sum of its proper divisors (235759216).

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

220521104 is a wasteful number, since it uses less digits than its factorization.

220521104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15399 (or 15393 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 220521104 is about 14849.9529965586. The cubic root of 220521104 is about 604.1573351509.

Adding to 220521104 its reverse (401125022), we get a palindrome (621646126).

The spelling of 220521104 in words is "two hundred twenty million, five hundred twenty-one thousand, one hundred four".