216502272 has 156 divisors (see below), whose sum is σ = 715565760. Its totient is φ = 61784064.

The previous prime is 216502241. The next prime is 216502277. The reversal of 216502272 is 272205612.

216502272 is a `hidden beast` number, since 2 + 1 + 650 + 2 + 2 + 7 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (216502277) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 257629 + ... + 258467.

It is an arithmetic number, because the mean of its divisors is an integer number (4586960).

Almost surely, 2^216502272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216502272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (357782880).

216502272 is an abundant number, since it is smaller than the sum of its proper divisors (499063488).

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

216502272 is an equidigital number, since it uses as much as digits as its factorization.

216502272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876 (or 851 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 216502272 is about 14714.0161750625. The cubic root of 216502272 is about 600.4647066533.

Adding to 216502272 its reverse (272205612), we get a palindrome (488707884).

The spelling of 216502272 in words is "two hundred sixteen million, five hundred two thousand, two hundred seventy-two".