220520055 has 16 divisors (see below), whose sum is σ = 403236864. Its totient is φ = 100809120.

The previous prime is 220520033. The next prime is 220520087. The reversal of 220520055 is 550025022.

It is not a de Polignac number, because 220520055 - 2⁶ = 220519991 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1049991 + ... + 1050200.

It is an arithmetic number, because the mean of its divisors is an integer number (25202304).

Almost surely, 2^220520055 is an apocalyptic number.

220520055 is a deficient number, since it is larger than the sum of its proper divisors (182716809).

220520055 is a wasteful number, since it uses less digits than its factorization.

220520055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2100206.

The product of its (nonzero) digits is 1000, while the sum is 21.

The square root of 220520055 is about 14849.9176765395. The cubic root of 220520055 is about 604.1563771745.

Adding to 220520055 its reverse (550025022), we get a palindrome (770545077).

The spelling of 220520055 in words is "two hundred twenty million, five hundred twenty thousand, fifty-five".