216186252 has 24 divisors (see below), whose sum is σ = 505134336. Its totient is φ = 71962128.

The previous prime is 216186233. The next prime is 216186253. The reversal of 216186252 is 252681612.

It is not an unprimeable number, because it can be changed into a prime (216186253) 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, 3208 + ... + 21039.

It is an arithmetic number, because the mean of its divisors is an integer number (21047264).

Almost surely, 2^216186252 is an apocalyptic number.

It is an amenable number.

216186252 is an abundant number, since it is smaller than the sum of its proper divisors (288948084).

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

216186252 is a wasteful number, since it uses less digits than its factorization.

216186252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24997 (or 24995 counting only the distinct ones).

The product of its digits is 11520, while the sum is 33.

The square root of 216186252 is about 14703.2735130650. The cubic root of 216186252 is about 600.1724060111.

The spelling of 216186252 in words is "two hundred sixteen million, one hundred eighty-six thousand, two hundred fifty-two".