216253 has 4 divisors (see below), whose sum is σ = 223740. Its totient is φ = 208768.

The previous prime is 216233. The next prime is 216259. The reversal of 216253 is 352612.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 88804 + 127449 = 298^2 + 357^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216253 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3700 + ... + 3757.

It is an arithmetic number, because the mean of its divisors is an integer number (55935).

2²¹⁶²⁵³ is an apocalyptic number.

It is an amenable number.

216253 is a deficient number, since it is larger than the sum of its proper divisors (7487).

216253 is an equidigital number, since it uses as much as digits as its factorization.

216253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7486.

The product of its digits is 360, while the sum is 19.

The square root of 216253 is about 465.0301065523. The cubic root of 216253 is about 60.0234167856.

Adding to 216253 its reverse (352612), we get a palindrome (568865).

The spelling of 216253 in words is "two hundred sixteen thousand, two hundred fifty-three".