13505423225 has 12 divisors (see below), whose sum is σ = 19139114304. Its totient is φ = 9260861520.

The previous prime is 13505423209. The next prime is 13505423249. The reversal of 13505423225 is 52232450531.

It is not a de Polignac number, because 13505423225 - 2⁴ = 13505423209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13505423191 and 13505423200.

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, 38586749 + ... + 38587098.

It is an arithmetic number, because the mean of its divisors is an integer number (1594926192).

Almost surely, 2^13505423225 is an apocalyptic number.

It is an amenable number.

13505423225 is a deficient number, since it is larger than the sum of its proper divisors (5633691079).

13505423225 is an equidigital number, since it uses as much as digits as its factorization.

13505423225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77173864 (or 77173859 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 32.

Adding to 13505423225 its reverse (52232450531), we get a palindrome (65737873756).

The spelling of 13505423225 in words is "thirteen billion, five hundred five million, four hundred twenty-three thousand, two hundred twenty-five".