221845468 has 24 divisors (see below), whose sum is σ = 419389040. Its totient is φ = 102072960.

The previous prime is 221845423. The next prime is 221845483. The reversal of 221845468 is 864548122.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 221845468.

It is a congruent number.

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, 10768 + ... + 23656.

Almost surely, 2^221845468 is an apocalyptic number.

It is an amenable number.

221845468 is a deficient number, since it is larger than the sum of its proper divisors (197543572).

221845468 is a wasteful number, since it uses less digits than its factorization.

221845468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13237 (or 13235 counting only the distinct ones).

The product of its digits is 122880, while the sum is 40.

The square root of 221845468 is about 14894.4777686228. The cubic root of 221845468 is about 605.3643667205.

The spelling of 221845468 in words is "two hundred twenty-one million, eight hundred forty-five thousand, four hundred sixty-eight".