220445144 has 16 divisors (see below), whose sum is σ = 435089400. Its totient is φ = 104421312.

The previous prime is 220445143. The next prime is 220445161. The reversal of 220445144 is 441544022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220445143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 724997 + ... + 725300.

Almost surely, 2^220445144 is an apocalyptic number.

It is an amenable number.

220445144 is a deficient number, since it is larger than the sum of its proper divisors (214644256).

220445144 is a wasteful number, since it uses less digits than its factorization.

220445144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1450322 (or 1450318 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 26.

The square root of 220445144 is about 14847.3951924235. The cubic root of 220445144 is about 604.0879584781.

Adding to 220445144 its reverse (441544022), we get a palindrome (661989166).

The spelling of 220445144 in words is "two hundred twenty million, four hundred forty-five thousand, one hundred forty-four".