220643163 has 64 divisors (see below), whose sum is σ = 371804160. Its totient is φ = 128304000.

The previous prime is 220643083. The next prime is 220643183. The reversal of 220643163 is 361346022.

220643163 is a `hidden beast` number, since 2 + 2 + 0 + 643 + 16 + 3 = 666.

It is not a de Polignac number, because 220643163 - 2²⁵ = 187088731 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (220643183) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1218933 + ... + 1219113.

It is an arithmetic number, because the mean of its divisors is an integer number (5809440).

Almost surely, 2^220643163 is an apocalyptic number.

220643163 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

220643163 is a deficient number, since it is larger than the sum of its proper divisors (151160997).

220643163 is a wasteful number, since it uses less digits than its factorization.

220643163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377 (or 371 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 220643163 is about 14854.0621716755. The cubic root of 220643163 is about 604.2687821393.

Adding to 220643163 its reverse (361346022), we get a palindrome (581989185).

It can be divided in two parts, 2206 and 43163, that added together give a square (45369 = 213²).

The spelling of 220643163 in words is "two hundred twenty million, six hundred forty-three thousand, one hundred sixty-three".