220241555 has 4 divisors (see below), whose sum is σ = 264289872. Its totient is φ = 176193240.

The previous prime is 220241551. The next prime is 220241561. The reversal of 220241555 is 555142022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 555142022 = 2 ⋅277571011.

It is not a de Polignac number, because 220241555 - 2² = 220241551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220241551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22024151 + ... + 22024160.

It is an arithmetic number, because the mean of its divisors is an integer number (66072468).

Almost surely, 2^220241555 is an apocalyptic number.

220241555 is a deficient number, since it is larger than the sum of its proper divisors (44048317).

220241555 is an equidigital number, since it uses as much as digits as its factorization.

220241555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44048316.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 220241555 is about 14840.5375576493. The cubic root of 220241555 is about 603.9019355653.

Adding to 220241555 its reverse (555142022), we get a palindrome (775383577).

The spelling of 220241555 in words is "two hundred twenty million, two hundred forty-one thousand, five hundred fifty-five".