221443041418 has 16 divisors (see below), whose sum is σ = 333694254600. Its totient is φ = 110212724736.

The previous prime is 221443041401. The next prime is 221443041493. The reversal of 221443041418 is 814140344122.

It can be written as a sum of positive squares in 4 ways, for example, as 199373859169 + 22069182249 = 446513^2 + 148557^2 .

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, 127830 + ... + 677662.

Almost surely, 2^221443041418 is an apocalyptic number.

221443041418 is a deficient number, since it is larger than the sum of its proper divisors (112251213182).

221443041418 is a wasteful number, since it uses less digits than its factorization.

221443041418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550761.

The product of its (nonzero) digits is 24576, while the sum is 34.

The spelling of 221443041418 in words is "two hundred twenty-one billion, four hundred forty-three million, forty-one thousand, four hundred eighteen".