221104418 has 16 divisors (see below), whose sum is σ = 334053720. Its totient is φ = 109756416.

The previous prime is 221104417. The next prime is 221104421. The reversal of 221104418 is 814401122.

It can be written as a sum of positive squares in 4 ways, for example, as 82500889 + 138603529 = 9083^2 + 11773^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221104393 and 221104402.

It is not an unprimeable number, because it can be changed into a prime (221104417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 287138 + ... + 287906.

Almost surely, 2^221104418 is an apocalyptic number.

221104418 is a deficient number, since it is larger than the sum of its proper divisors (112949302).

221104418 is a wasteful number, since it uses less digits than its factorization.

221104418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1621.

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 221104418 is about 14869.5802899746. The cubic root of 221104418 is about 604.6895641168.

The spelling of 221104418 in words is "two hundred twenty-one million, one hundred four thousand, four hundred eighteen".