220320155 has 8 divisors (see below), whose sum is σ = 288419184. Its totient is φ = 160232800.

The previous prime is 220320127. The next prime is 220320167. The reversal of 220320155 is 551023022.

220320155 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 220320155 - 2⁸ = 220319899 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, 2002856 + ... + 2002965.

It is an arithmetic number, because the mean of its divisors is an integer number (36052398).

Almost surely, 2^220320155 is an apocalyptic number.

220320155 is a deficient number, since it is larger than the sum of its proper divisors (68099029).

220320155 is a wasteful number, since it uses less digits than its factorization.

220320155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4005837.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 220320155 is about 14843.1854734757. The cubic root of 220320155 is about 603.9737673723.

Adding to 220320155 its reverse (551023022), we get a palindrome (771343177).

The spelling of 220320155 in words is "two hundred twenty million, three hundred twenty thousand, one hundred fifty-five".