216252 has 18 divisors (see below), whose sum is σ = 546728. Its totient is φ = 72072.

The previous prime is 216233. The next prime is 216259. The reversal of 216252 is 252612.

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

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

216252 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 5 ways as a sum of consecutive naturals, for example, 2968 + ... + 3039.

2²¹⁶²⁵² is an apocalyptic number.

It is an amenable number.

216252 is an abundant number, since it is smaller than the sum of its proper divisors (330476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216252 is a wasteful number, since it uses less digits than its factorization.

216252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6017 (or 6012 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 216252 is about 465.0290313518. The cubic root of 216252 is about 60.0233242651.

Adding to 216252 its reverse (252612), we get a palindrome (468864).

The spelling of 216252 in words is "two hundred sixteen thousand, two hundred fifty-two".