221602 has 8 divisors (see below), whose sum is σ = 334800. Its totient is φ = 110004.

The previous prime is 221587. The next prime is 221603. The reversal of 221602 is 206122.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (221603) by changing a digit.

221602 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, 49 + ... + 667.

It is an arithmetic number, because the mean of its divisors is an integer number (41850).

2²²¹⁶⁰² is an apocalyptic number.

221602 is a deficient number, since it is larger than the sum of its proper divisors (113198).

221602 is a wasteful number, since it uses less digits than its factorization.

221602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 221602 is about 470.7462161292. The cubic root of 221602 is about 60.5142829925.

Adding to 221602 its reverse (206122), we get a palindrome (427724).

The spelling of 221602 in words is "two hundred twenty-one thousand, six hundred two".