13530221406 has 24 divisors (see below), whose sum is σ = 31570517160. Its totient is φ = 4163144976.

The previous prime is 13530221389. The next prime is 13530221413. The reversal of 13530221406 is 60412203531.

13530221406 is a `hidden beast` number, since 1 + 3 + 5 + 30 + 221 + 406 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13530221406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28910496 + ... + 28910963.

It is an arithmetic number, because the mean of its divisors is an integer number (1315438215).

Almost surely, 2^13530221406 is an apocalyptic number.

13530221406 is an abundant number, since it is smaller than the sum of its proper divisors (18040295754).

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

13530221406 is a wasteful number, since it uses less digits than its factorization.

13530221406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57821480 (or 57821477 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 13530221406 its reverse (60412203531), we get a palindrome (73942424937).

The spelling of 13530221406 in words is "thirteen billion, five hundred thirty million, two hundred twenty-one thousand, four hundred six".