221841983 has 8 divisors (see below), whose sum is σ = 249816576. Its totient is φ = 195168600.

The previous prime is 221841953. The next prime is 221842003. The reversal of 221841983 is 389148122.

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

It is not a de Polignac number, because 221841983 - 2¹⁰ = 221840959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221841953) 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, 324941 + ... + 325622.

It is an arithmetic number, because the mean of its divisors is an integer number (31227072).

Almost surely, 2^221841983 is an apocalyptic number.

221841983 is a deficient number, since it is larger than the sum of its proper divisors (27974593).

221841983 is a wasteful number, since it uses less digits than its factorization.

221841983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650605.

The product of its digits is 27648, while the sum is 38.

The square root of 221841983 is about 14894.3607784960. The cubic root of 221841983 is about 605.3611967874.

The spelling of 221841983 in words is "two hundred twenty-one million, eight hundred forty-one thousand, nine hundred eighty-three".