220540555 has 8 divisors (see below), whose sum is σ = 268376544. Its totient is φ = 173947200.

The previous prime is 220540547. The next prime is 220540601. The reversal of 220540555 is 555045022.

220540555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 220540555 - 2³ = 220540547 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 310266 + ... + 310975.

It is an arithmetic number, because the mean of its divisors is an integer number (33547068).

Almost surely, 2^220540555 is an apocalyptic number.

220540555 is a deficient number, since it is larger than the sum of its proper divisors (47835989).

220540555 is an equidigital number, since it uses as much as digits as its factorization.

220540555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621317.

The product of its (nonzero) digits is 10000, while the sum is 28.

The square root of 220540555 is about 14850.6079000154. The cubic root of 220540555 is about 604.1750978028.

Adding to 220540555 its reverse (555045022), we get a palindrome (775585577).

The spelling of 220540555 in words is "two hundred twenty million, five hundred forty thousand, five hundred fifty-five".