216288252 has 24 divisors (see below), whose sum is σ = 560747600. Its totient is φ = 72096048.

The previous prime is 216288221. The next prime is 216288253. The reversal of 216288252 is 252882612.

216288252 is a `hidden beast` number, since 2 + 1 + 628 + 8 + 25 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216288253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1001227 + ... + 1001442.

Almost surely, 2^216288252 is an apocalyptic number.

It is an amenable number.

216288252 is an abundant number, since it is smaller than the sum of its proper divisors (344459348).

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

216288252 is a wasteful number, since it uses less digits than its factorization.

216288252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2002682 (or 2002674 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 216288252 is about 14706.7417193612. The cubic root of 216288252 is about 600.2667813619.

The spelling of 216288252 in words is "two hundred sixteen million, two hundred eighty-eight thousand, two hundred fifty-two".