13218016525 has 24 divisors (see below), whose sum is σ = 18829937664. Its totient is φ = 9016305600.

The previous prime is 13218016481. The next prime is 13218016573. The reversal of 13218016525 is 52561081231.

It is not a de Polignac number, because 13218016525 - 2⁹ = 13218016013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 164302 + ... + 231151.

It is an arithmetic number, because the mean of its divisors is an integer number (784580736).

Almost surely, 2^13218016525 is an apocalyptic number.

It is an amenable number.

13218016525 is a deficient number, since it is larger than the sum of its proper divisors (5611921139).

13218016525 is a wasteful number, since it uses less digits than its factorization.

13218016525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395661 (or 395656 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

Adding to 13218016525 its reverse (52561081231), we get a palindrome (65779097756).

The spelling of 13218016525 in words is "thirteen billion, two hundred eighteen million, sixteen thousand, five hundred twenty-five".