221845854 has 16 divisors (see below), whose sum is σ = 443864448. Its totient is φ = 73919832.

The previous prime is 221845831. The next prime is 221845873. The reversal of 221845854 is 458548122.

It is a happy number.

221845854 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 14559 + ... + 25605.

It is an arithmetic number, because the mean of its divisors is an integer number (27741528).

Almost surely, 2^221845854 is an apocalyptic number.

221845854 is an abundant number, since it is smaller than the sum of its proper divisors (222018594).

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

221845854 is a wasteful number, since it uses less digits than its factorization.

221845854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14399.

The product of its digits is 102400, while the sum is 39.

The square root of 221845854 is about 14894.4907264398. The cubic root of 221845854 is about 605.3647178215.

The spelling of 221845854 in words is "two hundred twenty-one million, eight hundred forty-five thousand, eight hundred fifty-four".