220215865 has 8 divisors (see below), whose sum is σ = 264358080. Its totient is φ = 176106672.

The previous prime is 220215839. The next prime is 220215889. The reversal of 220215865 is 568512022.

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 220215865 - 2¹¹ = 220213817 is a prime.

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, 10156 + ... + 23314.

It is an arithmetic number, because the mean of its divisors is an integer number (33044760).

Almost surely, 2^220215865 is an apocalyptic number.

It is an amenable number.

220215865 is a deficient number, since it is larger than the sum of its proper divisors (44142215).

220215865 is a wasteful number, since it uses less digits than its factorization.

220215865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16511.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 220215865 is about 14839.6719977229. The cubic root of 220215865 is about 603.8784540082.

Adding to 220215865 its reverse (568512022), we get a palindrome (788727887).

The spelling of 220215865 in words is "two hundred twenty million, two hundred fifteen thousand, eight hundred sixty-five".