221842366 has 16 divisors (see below), whose sum is σ = 350577360. Its totient is φ = 104993280.

The previous prime is 221842363. The next prime is 221842381. The reversal of 221842366 is 663248122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221842363) 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, 69150 + ... + 72286.

It is an arithmetic number, because the mean of its divisors is an integer number (21911085).

Almost surely, 2^221842366 is an apocalyptic number.

221842366 is a deficient number, since it is larger than the sum of its proper divisors (128734994).

221842366 is a wasteful number, since it uses less digits than its factorization.

221842366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5019.

The product of its digits is 27648, while the sum is 34.

The square root of 221842366 is about 14894.3736357055. The cubic root of 221842366 is about 605.3615451633.

The spelling of 221842366 in words is "two hundred twenty-one million, eight hundred forty-two thousand, three hundred sixty-six".