220805755 has 4 divisors (see below), whose sum is σ = 264966912. Its totient is φ = 176644600.

The previous prime is 220805743. The next prime is 220805833. The reversal of 220805755 is 557508022.

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

It is not a de Polignac number, because 220805755 - 2²³ = 212417147 is a prime.

It is a super-2 number, since 2×220805755² = 97510362882240050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220805755.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22080571 + ... + 22080580.

It is an arithmetic number, because the mean of its divisors is an integer number (66241728).

Almost surely, 2^220805755 is an apocalyptic number.

220805755 is a deficient number, since it is larger than the sum of its proper divisors (44161157).

220805755 is an equidigital number, since it uses as much as digits as its factorization.

220805755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44161156.

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

The square root of 220805755 is about 14859.5341447839. The cubic root of 220805755 is about 604.4171742989.

The spelling of 220805755 in words is "two hundred twenty million, eight hundred five thousand, seven hundred fifty-five".