221856382 has 8 divisors (see below), whose sum is σ = 363037752. Its totient is φ = 100843800.

The previous prime is 221856379. The next prime is 221856389. The reversal of 221856382 is 283658122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221856389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5042169 + ... + 5042212.

It is an arithmetic number, because the mean of its divisors is an integer number (45379719).

Almost surely, 2^221856382 is an apocalyptic number.

221856382 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221856382 is a deficient number, since it is larger than the sum of its proper divisors (141181370).

221856382 is a wasteful number, since it uses less digits than its factorization.

221856382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10084394.

The product of its digits is 46080, while the sum is 37.

The square root of 221856382 is about 14894.8441415142. The cubic root of 221856382 is about 605.3742938083.

The spelling of 221856382 in words is "two hundred twenty-one million, eight hundred fifty-six thousand, three hundred eighty-two".