216602 has 4 divisors (see below), whose sum is σ = 324906. Its totient is φ = 108300.

The previous prime is 216577. The next prime is 216607. The reversal of 216602 is 206612.

216602 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 137641 + 78961 = 371^2 + 281^2 .

It is a plaindrome in base 13.

It is a nialpdrome in base 12.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 216602.

It is not an unprimeable number, because it can be changed into a prime (216607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54149 + ... + 54152.

2²¹⁶⁶⁰² is an apocalyptic number.

216602 is a deficient number, since it is larger than the sum of its proper divisors (108304).

216602 is a wasteful number, since it uses less digits than its factorization.

216602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108303.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 216602 is about 465.4051997991. The cubic root of 216602 is about 60.0556890369.

It can be divided in two parts, 216 and 602, that added together give a palindrome (818).

The spelling of 216602 in words is "two hundred sixteen thousand, six hundred two".