216313250 has 16 divisors (see below), whose sum is σ = 404938872. Its totient is φ = 86525200.

The previous prime is 216313247. The next prime is 216313267. The reversal of 216313250 is 52313612.

216313250 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 105411289 + 110901961 = 10267^2 + 10531^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 432377 + ... + 432876.

Almost surely, 2^216313250 is an apocalyptic number.

216313250 is a deficient number, since it is larger than the sum of its proper divisors (188625622).

216313250 is an equidigital number, since it uses as much as digits as its factorization.

216313250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865270 (or 865260 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 216313250 is about 14707.5915771414. The cubic root of 216313250 is about 600.2899061977.

Adding to 216313250 its reverse (52313612), we get a palindrome (268626862).

The spelling of 216313250 in words is "two hundred sixteen million, three hundred thirteen thousand, two hundred fifty".