221163160 has 16 divisors (see below), whose sum is σ = 497617200. Its totient is φ = 88465248.

The previous prime is 221163157. The next prime is 221163161. The reversal of 221163160 is 61361122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221163161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2764500 + ... + 2764579.

It is an arithmetic number, because the mean of its divisors is an integer number (31101075).

Almost surely, 2^221163160 is an apocalyptic number.

221163160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221163160 is an abundant number, since it is smaller than the sum of its proper divisors (276454040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221163160 is a wasteful number, since it uses less digits than its factorization.

221163160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5529090 (or 5529086 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 221163160 is about 14871.5553994866. Note that the first 3 decimals coincide. The cubic root of 221163160 is about 604.7431097515.

The spelling of 221163160 in words is "two hundred twenty-one million, one hundred sixty-three thousand, one hundred sixty".