216622265 has 8 divisors (see below), whose sum is σ = 268332288. Its totient is φ = 167707440.

The previous prime is 216622223. The next prime is 216622271. The reversal of 216622265 is 562226612.

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

It is not a de Polignac number, because 216622265 - 2²⁰ = 215573689 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 698627 + ... + 698936.

It is an arithmetic number, because the mean of its divisors is an integer number (33541536).

Almost surely, 2^216622265 is an apocalyptic number.

It is an amenable number.

216622265 is a deficient number, since it is larger than the sum of its proper divisors (51710023).

216622265 is a wasteful number, since it uses less digits than its factorization.

216622265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397599.

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

The square root of 216622265 is about 14718.0931169768. The cubic root of 216622265 is about 600.5756188912.

Adding to 216622265 its reverse (562226612), we get a palindrome (778848877).

The spelling of 216622265 in words is "two hundred sixteen million, six hundred twenty-two thousand, two hundred sixty-five".