216750247 has 16 divisors (see below), whose sum is σ = 252979200. Its totient is φ = 181864800.

The previous prime is 216750241. The next prime is 216750257. The reversal of 216750247 is 742057612.

It is a cyclic number.

It is not a de Polignac number, because 216750247 - 2¹⁹ = 216225959 is a prime.

It is a super-2 number, since 2×216750247² = 93961339149122018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216750241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110122 + ... + 112072.

It is an arithmetic number, because the mean of its divisors is an integer number (15811200).

Almost surely, 2^216750247 is an apocalyptic number.

216750247 is a deficient number, since it is larger than the sum of its proper divisors (36228953).

216750247 is a wasteful number, since it uses less digits than its factorization.

216750247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2286.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 216750247 is about 14722.4402528929. The cubic root of 216750247 is about 600.6938704119.

The spelling of 216750247 in words is "two hundred sixteen million, seven hundred fifty thousand, two hundred forty-seven".