220221544 has 32 divisors (see below), whose sum is σ = 417241440. Its totient is φ = 108964800.

The previous prime is 220221541. The next prime is 220221583. The reversal of 220221544 is 445122022.

It is not an unprimeable number, because it can be changed into a prime (220221541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 477474 + ... + 477934.

It is an arithmetic number, because the mean of its divisors is an integer number (13038795).

Almost surely, 2^220221544 is an apocalyptic number.

It is an amenable number.

220221544 is a deficient number, since it is larger than the sum of its proper divisors (197019896).

220221544 is a wasteful number, since it uses less digits than its factorization.

220221544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961 (or 957 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 220221544 is about 14839.8633416888. The cubic root of 220221544 is about 603.8836449697.

Adding to 220221544 its reverse (445122022), we get a palindrome (665343566).

The spelling of 220221544 in words is "two hundred twenty million, two hundred twenty-one thousand, five hundred forty-four".