216224250 has 64 divisors (see below), whose sum is σ = 588781440. Its totient is φ = 52416000.

The previous prime is 216224249. The next prime is 216224251. The reversal of 216224250 is 52422612.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (216224249) and next prime (216224251).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 216224250.

It is not an unprimeable number, because it can be changed into a prime (216224251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4855 + ... + 21354.

It is an arithmetic number, because the mean of its divisors is an integer number (9199710).

Almost surely, 2^216224250 is an apocalyptic number.

216224250 is an abundant number, since it is smaller than the sum of its proper divisors (372557190).

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

216224250 is a wasteful number, since it uses less digits than its factorization.

216224250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26240 (or 26230 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 216224250 is about 14704.5656175217. The cubic root of 216224250 is about 600.2075670738.

Adding to 216224250 its reverse (52422612), we get a palindrome (268646862).

The spelling of 216224250 in words is "two hundred sixteen million, two hundred twenty-four thousand, two hundred fifty".