215164213135 has 4 divisors (see below), whose sum is σ = 258197055768. Its totient is φ = 172131370504.

The previous prime is 215164213133. The next prime is 215164213141. The reversal of 215164213135 is 531312461512.

215164213135 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 215164213135 - 2¹ = 215164213133 is a prime.

It is a super-2 number, since 2×215164213135² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 215164213135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215164213133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21516421309 + ... + 21516421318.

It is an arithmetic number, because the mean of its divisors is an integer number (64549263942).

Almost surely, 2^215164213135 is an apocalyptic number.

215164213135 is a deficient number, since it is larger than the sum of its proper divisors (43032842633).

215164213135 is an equidigital number, since it uses as much as digits as its factorization.

215164213135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43032842632.

The product of its digits is 21600, while the sum is 34.

Adding to 215164213135 its reverse (531312461512), we get a palindrome (746476674647).

The spelling of 215164213135 in words is "two hundred fifteen billion, one hundred sixty-four million, two hundred thirteen thousand, one hundred thirty-five".