13215136205 has 8 divisors (see below), whose sum is σ = 15860026104. Its totient is φ = 10570867200.

The previous prime is 13215136171. The next prime is 13215136211. The reversal of 13215136205 is 50263151231.

It can be written as a sum of positive squares in 4 ways, for example, as 50098084 + 13165038121 = 7078^2 + 114739^2 .

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

It is not a de Polignac number, because 13215136205 - 2²⁴ = 13198358989 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 7 ways as a sum of consecutive naturals, for example, 107036 + ... + 194645.

It is an arithmetic number, because the mean of its divisors is an integer number (1982503263).

Almost surely, 2^13215136205 is an apocalyptic number.

It is an amenable number.

13215136205 is a deficient number, since it is larger than the sum of its proper divisors (2644889899).

13215136205 is an equidigital number, since it uses as much as digits as its factorization.

13215136205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310447.

The product of its (nonzero) digits is 5400, while the sum is 29.

Adding to 13215136205 its reverse (50263151231), we get a palindrome (63478287436).

The spelling of 13215136205 in words is "thirteen billion, two hundred fifteen million, one hundred thirty-six thousand, two hundred five".