13513205231 has 16 divisors (see below), whose sum is σ = 14060389728. Its totient is φ = 12976588800.

The previous prime is 13513205219. The next prime is 13513205239. The reversal of 13513205231 is 13250231531.

It is a cyclic number.

It is not a de Polignac number, because 13513205231 - 2¹⁴ = 13513188847 is a prime.

It is a super-2 number, since 2×13513205231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13513205231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13513205239) 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, 1000916 + ... + 1014326.

It is an arithmetic number, because the mean of its divisors is an integer number (878774358).

Almost surely, 2^13513205231 is an apocalyptic number.

13513205231 is a deficient number, since it is larger than the sum of its proper divisors (547184497).

13513205231 is a wasteful number, since it uses less digits than its factorization.

13513205231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13802.

The product of its (nonzero) digits is 2700, while the sum is 26.

Adding to 13513205231 its reverse (13250231531), we get a palindrome (26763436762).

The spelling of 13513205231 in words is "thirteen billion, five hundred thirteen million, two hundred five thousand, two hundred thirty-one".