216236265 has 24 divisors (see below), whose sum is σ = 402465600. Its totient is φ = 98850528.

The previous prime is 216236261. The next prime is 216236281. The reversal of 216236265 is 562632612.

It is not a de Polignac number, because 216236265 - 2² = 216236261 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216236261) 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 23 ways as a sum of consecutive naturals, for example, 146365 + ... + 147834.

It is an arithmetic number, because the mean of its divisors is an integer number (16769400).

Almost surely, 2^216236265 is an apocalyptic number.

It is an amenable number.

216236265 is a deficient number, since it is larger than the sum of its proper divisors (186229335).

216236265 is a wasteful number, since it uses less digits than its factorization.

216236265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294221 (or 294214 counting only the distinct ones).

The product of its digits is 25920, while the sum is 33.

The square root of 216236265 is about 14704.9741584268. The cubic root of 216236265 is about 600.2186841746.

Adding to 216236265 its reverse (562632612), we get a palindrome (778868877).

The spelling of 216236265 in words is "two hundred sixteen million, two hundred thirty-six thousand, two hundred sixty-five".