13401543321 has 12 divisors (see below), whose sum is σ = 19358797120. Its totient is φ = 8933895000.

The previous prime is 13401543299. The next prime is 13401543401. The reversal of 13401543321 is 12334510431.

It is a happy number.

It is not a de Polignac number, because 13401543321 - 2¹⁷ = 13401412249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13401563321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 281700 + ... + 325818.

Almost surely, 2^13401543321 is an apocalyptic number.

It is an amenable number.

13401543321 is a deficient number, since it is larger than the sum of its proper divisors (5957253799).

13401543321 is a wasteful number, since it uses less digits than its factorization.

13401543321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77876 (or 77873 counting only the distinct ones).

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

The spelling of 13401543321 in words is "thirteen billion, four hundred one million, five hundred forty-three thousand, three hundred twenty-one".