221079982 has 8 divisors (see below), whose sum is σ = 337056552. Its totient is φ = 108727800.

The previous prime is 221079977. The next prime is 221080001. The reversal of 221079982 is 289970122.

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

It is a super-3 number, since 3×221079982³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 905944 + ... + 906187.

It is an arithmetic number, because the mean of its divisors is an integer number (42132069).

Almost surely, 2^221079982 is an apocalyptic number.

221079982 is a deficient number, since it is larger than the sum of its proper divisors (115976570).

221079982 is a wasteful number, since it uses less digits than its factorization.

221079982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1812194.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 221079982 is about 14868.7585897411. The cubic root of 221079982 is about 604.6672869522.

The spelling of 221079982 in words is "two hundred twenty-one million, seventy-nine thousand, nine hundred eighty-two".