216305265 has 48 divisors (see below), whose sum is σ = 387080640. Its totient is φ = 102291840.

The previous prime is 216305261. The next prime is 216305281. The reversal of 216305265 is 562503612.

216305265 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 216305265 - 2² = 216305261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216305261) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 304731 + ... + 305439.

It is an arithmetic number, because the mean of its divisors is an integer number (8064180).

Almost surely, 2^216305265 is an apocalyptic number.

It is an amenable number.

216305265 is a deficient number, since it is larger than the sum of its proper divisors (170775375).

216305265 is a wasteful number, since it uses less digits than its factorization.

216305265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814 (or 771 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 216305265 is about 14707.3201161870. The cubic root of 216305265 is about 600.2825197279.

Adding to 216305265 its reverse (562503612), we get a palindrome (778808877).

The spelling of 216305265 in words is "two hundred sixteen million, three hundred five thousand, two hundred sixty-five".