13213455218 has 4 divisors (see below), whose sum is σ = 19820182830. Its totient is φ = 6606727608.

The previous prime is 13213455217. The next prime is 13213455259. The reversal of 13213455218 is 81255431231.

13213455218 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, and also an emirpimes, since its reverse is a distinct semiprime: 81255431231 = 13 ⋅6250417787.

It can be written as a sum of positive squares in only one way, i.e., 13200401449 + 13053769 = 114893^2 + 3613^2 .

It is not an unprimeable number, because it can be changed into a prime (13213455217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3303363803 + ... + 3303363806.

Almost surely, 2^13213455218 is an apocalyptic number.

13213455218 is a deficient number, since it is larger than the sum of its proper divisors (6606727612).

13213455218 is an equidigital number, since it uses as much as digits as its factorization.

13213455218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6606727611.

The product of its digits is 28800, while the sum is 35.

Adding to 13213455218 its reverse (81255431231), we get a palindrome (94468886449).

The spelling of 13213455218 in words is "thirteen billion, two hundred thirteen million, four hundred fifty-five thousand, two hundred eighteen".