221702 has 8 divisors (see below), whose sum is σ = 358176. Its totient is φ = 102312.

The previous prime is 221677. The next prime is 221707. The reversal of 221702 is 207122.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4238 + ... + 4289.

It is an arithmetic number, because the mean of its divisors is an integer number (44772).

2²²¹⁷⁰² is an apocalyptic number.

221702 is a deficient number, since it is larger than the sum of its proper divisors (136474).

221702 is a wasteful number, since it uses less digits than its factorization.

221702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8542.

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 221702 is about 470.8524184922. The cubic root of 221702 is about 60.5233841713.

Adding to 221702 its reverse (207122), we get a palindrome (428824).

The spelling of 221702 in words is "two hundred twenty-one thousand, seven hundred two", and thus it is an iban number.