13503155231 has 4 divisors (see below), whose sum is σ = 13510833600. Its totient is φ = 13495476864.

The previous prime is 13503155221. The next prime is 13503155257. The reversal of 13503155231 is 13255130531.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 13503155231 - 2¹⁰ = 13503154207 is a prime.

It is a super-3 number, since 3×13503155231³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13503155194 and 13503155203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13503155221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3836546 + ... + 3840063.

It is an arithmetic number, because the mean of its divisors is an integer number (3377708400).

Almost surely, 2^13503155231 is an apocalyptic number.

13503155231 is a deficient number, since it is larger than the sum of its proper divisors (7678369).

13503155231 is an equidigital number, since it uses as much as digits as its factorization.

13503155231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7678368.

The product of its (nonzero) digits is 6750, while the sum is 29.

Adding to 13503155231 its reverse (13255130531), we get a palindrome (26758285762).

The spelling of 13503155231 in words is "thirteen billion, five hundred three million, one hundred fifty-five thousand, two hundred thirty-one".