220388871 has 8 divisors (see below), whose sum is σ = 294024304. Its totient is φ = 146839680.

The previous prime is 220388849. The next prime is 220388891. The reversal of 220388871 is 178883022.

220388871 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 220388871 - 2⁷ = 220388743 is a prime.

It is the 14846-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220388891) by changing a digit.

It is a nontrivial repunit in base 14845.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15340 + ... + 26001.

It is an arithmetic number, because the mean of its divisors is an integer number (36753038).

Almost surely, 2^220388871 is an apocalyptic number.

220388871 is a deficient number, since it is larger than the sum of its proper divisors (73635433).

220388871 is a wasteful number, since it uses less digits than its factorization.

220388871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43121.

The product of its (nonzero) digits is 43008, while the sum is 39.

The square root of 220388871 is about 14845.5000252602. The cubic root of 220388871 is about 604.0365522885.

The spelling of 220388871 in words is "two hundred twenty million, three hundred eighty-eight thousand, eight hundred seventy-one".