13530553212 has 96 divisors (see below), whose sum is σ = 35406733824. Its totient is φ = 3986841600.

The previous prime is 13530553207. The next prime is 13530553297. The reversal of 13530553212 is 21235503531.

It is a self number, because there is not a number n which added to its sum of digits gives 13530553212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 674268 + ... + 694044.

It is an arithmetic number, because the mean of its divisors is an integer number (368820144).

Almost surely, 2^13530553212 is an apocalyptic number.

13530553212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13530553212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17703366912).

13530553212 is an abundant number, since it is smaller than the sum of its proper divisors (21876180612).

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

13530553212 is a wasteful number, since it uses less digits than its factorization.

13530553212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19939 (or 19937 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 30.

The spelling of 13530553212 in words is "thirteen billion, five hundred thirty million, five hundred fifty-three thousand, two hundred twelve".