221082 has 8 divisors (see below), whose sum is σ = 442176. Its totient is φ = 73692.

The previous prime is 221077. The next prime is 221083. The reversal of 221082 is 280122.

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

221082 is an admirable number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (221083) by changing a digit.

221082 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18418 + ... + 18429.

It is an arithmetic number, because the mean of its divisors is an integer number (55272).

2²²¹⁰⁸² is an apocalyptic number.

221082 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221082 is a wasteful number, since it uses less digits than its factorization.

221082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36852.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 221082 is about 470.1935771573. The cubic root of 221082 is about 60.4669126731.

The spelling of 221082 in words is "two hundred twenty-one thousand, eighty-two".