220644155 has 8 divisors (see below), whose sum is σ = 266160384. Its totient is φ = 175590400.

The previous prime is 220644133. The next prime is 220644161. The reversal of 220644155 is 551446022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 220644155 - 2⁶ = 220644091 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, 114566 + ... + 116475.

It is an arithmetic number, because the mean of its divisors is an integer number (33270048).

Almost surely, 2^220644155 is an apocalyptic number.

220644155 is a deficient number, since it is larger than the sum of its proper divisors (45516229).

220644155 is a wasteful number, since it uses less digits than its factorization.

220644155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231237.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 220644155 is about 14854.0955631772. The cubic root of 220644155 is about 604.2696877247.

The spelling of 220644155 in words is "two hundred twenty million, six hundred forty-four thousand, one hundred fifty-five".