13615012220 has 48 divisors (see below), whose sum is σ = 29593892160. Its totient is φ = 5255287296.

The previous prime is 13615012199. The next prime is 13615012223. The reversal of 13615012220 is 2221051631.

13615012220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13615012223) 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 in 15 ways as a sum of consecutive naturals, for example, 1243289 + ... + 1254191.

It is an arithmetic number, because the mean of its divisors is an integer number (616539420).

Almost surely, 2^13615012220 is an apocalyptic number.

13615012220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13615012220 is an abundant number, since it is smaller than the sum of its proper divisors (15978879940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13615012220 is a wasteful number, since it uses less digits than its factorization.

13615012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13094 (or 13092 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 13615012220 its reverse (2221051631), we get a palindrome (15836063851).

The spelling of 13615012220 in words is "thirteen billion, six hundred fifteen million, twelve thousand, two hundred twenty".