220705855 has 16 divisors (see below), whose sum is σ = 269136000. Its totient is φ = 173721600.

The previous prime is 220705853. The next prime is 220705867. The reversal of 220705855 is 558507022.

It is not a de Polignac number, because 220705855 - 2¹ = 220705853 is a prime.

It is a super-2 number, since 2×220705855² = 97422148862562050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 220705855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220705853) by changing a digit.

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, 137055 + ... + 138655.

It is an arithmetic number, because the mean of its divisors is an integer number (16821000).

Almost surely, 2^220705855 is an apocalyptic number.

220705855 is a deficient number, since it is larger than the sum of its proper divisors (48430145).

220705855 is a wasteful number, since it uses less digits than its factorization.

220705855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2034.

The product of its (nonzero) digits is 28000, while the sum is 34.

The square root of 220705855 is about 14856.1722862923. The cubic root of 220705855 is about 604.3260076168.

The spelling of 220705855 in words is "two hundred twenty million, seven hundred five thousand, eight hundred fifty-five".