2216261065 has 16 divisors (see below), whose sum is σ = 2726064000. Its totient is φ = 1728784512.

The previous prime is 2216261063. The next prime is 2216261081. The reversal of 2216261065 is 5601626122.

It is a cyclic number.

It is not a de Polignac number, because 2216261065 - 2¹ = 2216261063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2216261063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120181 + ... + 137389.

It is an arithmetic number, because the mean of its divisors is an integer number (170379000).

Almost surely, 2^2216261065 is an apocalyptic number.

It is an amenable number.

2216261065 is a deficient number, since it is larger than the sum of its proper divisors (509802935).

2216261065 is a wasteful number, since it uses less digits than its factorization.

2216261065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17856.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 2216261065 is about 47077.1819993508. The cubic root of 2216261065 is about 1303.7879783835.

Adding to 2216261065 its reverse (5601626122), we get a palindrome (7817887187).

The spelling of 2216261065 in words is "two billion, two hundred sixteen million, two hundred sixty-one thousand, sixty-five".