216226265 has 4 divisors (see below), whose sum is σ = 259471524. Its totient is φ = 172981008.

The previous prime is 216226249. The next prime is 216226279. The reversal of 216226265 is 562622612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50537881 + 165688384 = 7109^2 + 12872^2 .

It is a cyclic number.

It is not a de Polignac number, because 216226265 - 2⁴ = 216226249 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21622622 + ... + 21622631.

It is an arithmetic number, because the mean of its divisors is an integer number (64867881).

Almost surely, 2^216226265 is an apocalyptic number.

It is an amenable number.

216226265 is a deficient number, since it is larger than the sum of its proper divisors (43245259).

216226265 is an equidigital number, since it uses as much as digits as its factorization.

216226265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43245258.

The product of its digits is 17280, while the sum is 32.

The square root of 216226265 is about 14704.6341334968. The cubic root of 216226265 is about 600.2094315185.

Adding to 216226265 its reverse (562622612), we get a palindrome (778848877).

The spelling of 216226265 in words is "two hundred sixteen million, two hundred twenty-six thousand, two hundred sixty-five".