2215212311 has 16 divisors (see below), whose sum is σ = 2456856864. Its totient is φ = 1984051584.

The previous prime is 2215212269. The next prime is 2215212323. The reversal of 2215212311 is 1132125122.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2215212311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2215212361) 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 15 ways as a sum of consecutive naturals, for example, 173240 + ... + 185586.

It is an arithmetic number, because the mean of its divisors is an integer number (153553554).

Almost surely, 2^2215212311 is an apocalyptic number.

2215212311 is a deficient number, since it is larger than the sum of its proper divisors (241644553).

2215212311 is a wasteful number, since it uses less digits than its factorization.

2215212311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12770.

The product of its digits is 240, while the sum is 20.

The square root of 2215212311 is about 47066.0420154489. The cubic root of 2215212311 is about 1303.5822913344.

Adding to 2215212311 its reverse (1132125122), we get a palindrome (3347337433).

The spelling of 2215212311 in words is "two billion, two hundred fifteen million, two hundred twelve thousand, three hundred eleven".