212165331313 has 16 divisors (see below), whose sum is σ = 234495547776. Its totient is φ = 190760129280.

The previous prime is 212165331271. The next prime is 212165331359. The reversal of 212165331313 is 313133561212.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212165331313 is a prime.

It is a super-2 number, since 2×212165331313² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212165331373) 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, 1308120 + ... + 1461337.

It is an arithmetic number, because the mean of its divisors is an integer number (14655971736).

Almost surely, 2^212165331313 is an apocalyptic number.

It is an amenable number.

212165331313 is a deficient number, since it is larger than the sum of its proper divisors (22330216463).

212165331313 is a wasteful number, since it uses less digits than its factorization.

212165331313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2769624.

The product of its digits is 9720, while the sum is 31.

Adding to 212165331313 its reverse (313133561212), we get a palindrome (525298892525).

The spelling of 212165331313 in words is "two hundred twelve billion, one hundred sixty-five million, three hundred thirty-one thousand, three hundred thirteen".