2212512217565 has 16 divisors (see below), whose sum is σ = 2859575674368. Its totient is φ = 1633667109696.

The previous prime is 2212512217499. The next prime is 2212512217583. The reversal of 2212512217565 is 5657122152122.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2212512217565 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1388717 + ... + 2520626.

It is an arithmetic number, because the mean of its divisors is an integer number (178723479648).

Almost surely, 2^{2212512217565} is an apocalyptic number.

It is an amenable number.

2212512217565 is a deficient number, since it is larger than the sum of its proper divisors (647063456803).

2212512217565 is a wasteful number, since it uses less digits than its factorization.

2212512217565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3918068.

The product of its digits is 168000, while the sum is 41.

Adding to 2212512217565 its reverse (5657122152122), we get a palindrome (7869634369687).

The spelling of 2212512217565 in words is "two trillion, two hundred twelve billion, five hundred twelve million, two hundred seventeen thousand, five hundred sixty-five".