13502172243 has 16 divisors (see below), whose sum is σ = 20923464960. Its totient is φ = 7584754656.

The previous prime is 13502172223. The next prime is 13502172269. The reversal of 13502172243 is 34227120531.

It is not a de Polignac number, because 13502172243 - 2¹⁸ = 13501910099 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13502172243.

It is not an unprimeable number, because it can be changed into a prime (13502172223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5447580 + ... + 5450057.

It is an arithmetic number, because the mean of its divisors is an integer number (1307716560).

Almost surely, 2^13502172243 is an apocalyptic number.

13502172243 is a deficient number, since it is larger than the sum of its proper divisors (7421292717).

13502172243 is a wasteful number, since it uses less digits than its factorization.

13502172243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10897706.

The product of its (nonzero) digits is 10080, while the sum is 30.

Adding to 13502172243 its reverse (34227120531), we get a palindrome (47729292774).

It can be divided in two parts, 13502 and 172243, that added together give a triangular number (185745 = T₆₀₉).

The spelling of 13502172243 in words is "thirteen billion, five hundred two million, one hundred seventy-two thousand, two hundred forty-three".