13543221304 has 8 divisors (see below), whose sum is σ = 25393539960. Its totient is φ = 6771610648.

The previous prime is 13543221301. The next prime is 13543221359. The reversal of 13543221304 is 40312234531.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13543221301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 846451324 + ... + 846451339.

It is an arithmetic number, because the mean of its divisors is an integer number (3174192495).

Almost surely, 2^13543221304 is an apocalyptic number.

It is an amenable number.

13543221304 is a deficient number, since it is larger than the sum of its proper divisors (11850318656).

13543221304 is a wasteful number, since it uses less digits than its factorization.

13543221304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1692902669 (or 1692902665 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 13543221304 its reverse (40312234531), we get a palindrome (53855455835).

The spelling of 13543221304 in words is "thirteen billion, five hundred forty-three million, two hundred twenty-one thousand, three hundred four".