13530221351 has 4 divisors (see below), whose sum is σ = 13682246400. Its totient is φ = 13378196304.

The previous prime is 13530221333. The next prime is 13530221363. The reversal of 13530221351 is 15312203531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13530221351 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13530221351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13530221311) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 76012391 + ... + 76012568.

It is an arithmetic number, because the mean of its divisors is an integer number (3420561600).

Almost surely, 2^13530221351 is an apocalyptic number.

13530221351 is a deficient number, since it is larger than the sum of its proper divisors (152025049).

13530221351 is an equidigital number, since it uses as much as digits as its factorization.

13530221351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152025048.

The product of its (nonzero) digits is 2700, while the sum is 26.

Adding to 13530221351 its reverse (15312203531), we get a palindrome (28842424882).

The spelling of 13530221351 in words is "thirteen billion, five hundred thirty million, two hundred twenty-one thousand, three hundred fifty-one".