13503023131 has 4 divisors (see below), whose sum is σ = 14541717232. Its totient is φ = 12464329032.

The previous prime is 13503023119. The next prime is 13503023147. The reversal of 13503023131 is 13132030531.

It is a happy number.

13503023131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13132030531 = 29 ⋅452828639.

It is a cyclic number.

It is not a de Polignac number, because 13503023131 - 2²¹ = 13500925979 is a prime.

It is a super-2 number, since 2×13503023131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13503003131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 519347031 + ... + 519347056.

It is an arithmetic number, because the mean of its divisors is an integer number (3635429308).

Almost surely, 2^13503023131 is an apocalyptic number.

13503023131 is a deficient number, since it is larger than the sum of its proper divisors (1038694101).

13503023131 is a wasteful number, since it uses less digits than its factorization.

13503023131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038694100.

The product of its (nonzero) digits is 810, while the sum is 22.

Adding to 13503023131 its reverse (13132030531), we get a palindrome (26635053662).

The spelling of 13503023131 in words is "thirteen billion, five hundred three million, twenty-three thousand, one hundred thirty-one".