221845484 has 24 divisors (see below), whose sum is σ = 445431840. Its totient is φ = 94703616.

The previous prime is 221845483. The next prime is 221845489. The reversal of 221845484 is 484548122.

221845484 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (221845483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8219 + ... + 22610.

It is an arithmetic number, because the mean of its divisors is an integer number (18559660).

Almost surely, 2^221845484 is an apocalyptic number.

It is an amenable number.

221845484 is an abundant number, since it is smaller than the sum of its proper divisors (223586356).

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

221845484 is a wasteful number, since it uses less digits than its factorization.

221845484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31097 (or 31095 counting only the distinct ones).

The product of its digits is 81920, while the sum is 38.

The square root of 221845484 is about 14894.4783057346. The cubic root of 221845484 is about 605.3643812739.

The spelling of 221845484 in words is "two hundred twenty-one million, eight hundred forty-five thousand, four hundred eighty-four".