216433265 has 8 divisors (see below), whose sum is σ = 259823400. Its totient is φ = 173077632.

The previous prime is 216433253. The next prime is 216433267. The reversal of 216433265 is 562334612.

It can be written as a sum of positive squares in 4 ways, for example, as 39037504 + 177395761 = 6248^2 + 13319^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 216433265 - 2¹⁰ = 216432241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216433267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8147 + ... + 22343.

It is an arithmetic number, because the mean of its divisors is an integer number (32477925).

Almost surely, 2^216433265 is an apocalyptic number.

It is an amenable number.

216433265 is a deficient number, since it is larger than the sum of its proper divisors (43390135).

216433265 is a wasteful number, since it uses less digits than its factorization.

216433265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17251.

The product of its digits is 25920, while the sum is 32.

The square root of 216433265 is about 14711.6710471652. The cubic root of 216433265 is about 600.4009033641.

Adding to 216433265 its reverse (562334612), we get a palindrome (778767877).

The spelling of 216433265 in words is "two hundred sixteen million, four hundred thirty-three thousand, two hundred sixty-five".