221151982 has 8 divisors (see below), whose sum is σ = 349187400. Its totient is φ = 104756184.

The previous prime is 221151977. The next prime is 221152013. The reversal of 221151982 is 289151122.

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

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, 2909857 + ... + 2909932.

It is an arithmetic number, because the mean of its divisors is an integer number (43648425).

Almost surely, 2^221151982 is an apocalyptic number.

221151982 is a deficient number, since it is larger than the sum of its proper divisors (128035418).

221151982 is a wasteful number, since it uses less digits than its factorization.

221151982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5819810.

The product of its digits is 2880, while the sum is 31.

The square root of 221151982 is about 14871.1795766173. The cubic root of 221151982 is about 604.7329212970.

The spelling of 221151982 in words is "two hundred twenty-one million, one hundred fifty-one thousand, nine hundred eighty-two".