13115220534 has 48 divisors (see below), whose sum is σ = 30610563984. Its totient is φ = 4034347200.

The previous prime is 13115220533. The next prime is 13115220539. The reversal of 13115220534 is 43502251131.

13115220534 is a `hidden beast` number, since 13 + 115 + 2 + 2 + 0 + 534 = 666.

13115220534 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 13115220498 and 13115220507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13115220533) 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 23 ways as a sum of consecutive naturals, for example, 1394869 + ... + 1404239.

It is an arithmetic number, because the mean of its divisors is an integer number (637720083).

Almost surely, 2^13115220534 is an apocalyptic number.

13115220534 is an abundant number, since it is smaller than the sum of its proper divisors (17495343450).

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

13115220534 is a wasteful number, since it uses less digits than its factorization.

13115220534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15373 (or 15370 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 13115220534 its reverse (43502251131), we get a palindrome (56617471665).

The spelling of 13115220534 in words is "thirteen billion, one hundred fifteen million, two hundred twenty thousand, five hundred thirty-four".