13443520321445 has 16 divisors (see below), whose sum is σ = 16136727532992. Its totient is φ = 10751814610560.

The previous prime is 13443520321421. The next prime is 13443520321463. The reversal of 13443520321445 is 54412302534431.

It is not a de Polignac number, because 13443520321445 - 2¹⁸ = 13443520059301 is a prime.

It is a super-2 number, since 2×13443520321445² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 345102089 + ... + 345141041.

It is an arithmetic number, because the mean of its divisors is an integer number (1008545470812).

Almost surely, 2^{13443520321445} is an apocalyptic number.

It is an amenable number.

13443520321445 is a deficient number, since it is larger than the sum of its proper divisors (2693207211547).

13443520321445 is a wasteful number, since it uses less digits than its factorization.

13443520321445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56452.

The product of its (nonzero) digits is 691200, while the sum is 41.

Adding to 13443520321445 its reverse (54412302534431), we get a palindrome (67855822855876).

The spelling of 13443520321445 in words is "thirteen trillion, four hundred forty-three billion, five hundred twenty million, three hundred twenty-one thousand, four hundred forty-five".