220220554 has 4 divisors (see below), whose sum is σ = 330330834. Its totient is φ = 110110276.

The previous prime is 220220551. The next prime is 220220573. The reversal of 220220554 is 455022022.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 149206225 + 71014329 = 12215^2 + 8427^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (220220551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55055137 + ... + 55055140.

Almost surely, 2^220220554 is an apocalyptic number.

220220554 is a deficient number, since it is larger than the sum of its proper divisors (110110280).

220220554 is a wasteful number, since it uses less digits than its factorization.

220220554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110110279.

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 220220554 is about 14839.8299855490. The cubic root of 220220554 is about 603.8827400542.

Adding to 220220554 its reverse (455022022), we get a palindrome (675242576).

The spelling of 220220554 in words is "two hundred twenty million, two hundred twenty thousand, five hundred fifty-four".