2216642512265 has 8 divisors (see below), whose sum is σ = 2660985899208. Its totient is φ = 1772637420160.

The previous prime is 2216642512261. The next prime is 2216642512313. The reversal of 2216642512265 is 5622152466122.

It can be written as a sum of positive squares in 4 ways, for example, as 1260565317001 + 956077195264 = 1122749^2 + 977792^2 .

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

It is not a de Polignac number, because 2216642512265 - 2² = 2216642512261 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2216642512261) 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 7 ways as a sum of consecutive naturals, for example, 84559292 + ... + 84585501.

It is an arithmetic number, because the mean of its divisors is an integer number (332623237401).

Almost surely, 2^{2216642512265} is an apocalyptic number.

It is an amenable number.

2216642512265 is a deficient number, since it is larger than the sum of its proper divisors (444343386943).

2216642512265 is a wasteful number, since it uses less digits than its factorization.

2216642512265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169147419.

The product of its digits is 691200, while the sum is 44.

Adding to 2216642512265 its reverse (5622152466122), we get a palindrome (7838794978387).

The spelling of 2216642512265 in words is "two trillion, two hundred sixteen billion, six hundred forty-two million, five hundred twelve thousand, two hundred sixty-five".