221084 has 12 divisors (see below), whose sum is σ = 407400. Its totient is φ = 104688.

The previous prime is 221083. The next prime is 221087. The reversal of 221084 is 480122.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221083) 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, 1379 + ... + 1530.

It is an arithmetic number, because the mean of its divisors is an integer number (33950).

2²²¹⁰⁸⁴ is an apocalyptic number.

It is an amenable number.

221084 is a deficient number, since it is larger than the sum of its proper divisors (186316).

221084 is a wasteful number, since it uses less digits than its factorization.

221084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2932 (or 2930 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 221084 is about 470.1957039361. The cubic root of 221084 is about 60.4670950089.

The spelling of 221084 in words is "two hundred twenty-one thousand, eighty-four".