13540204531 has 24 divisors (see below), whose sum is σ = 16019599392. Its totient is φ = 11209728000.

The previous prime is 13540204529. The next prime is 13540204541.

13540204531 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 13540204531 - 2¹ = 13540204529 is a prime.

It is a super-2 number, since 2×13540204531² (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 13540204531.

It is not an unprimeable number, because it can be changed into a prime (13540204541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1182771 + ... + 1194163.

It is an arithmetic number, because the mean of its divisors is an integer number (667483308).

Almost surely, 2^13540204531 is an apocalyptic number.

13540204531 is a deficient number, since it is larger than the sum of its proper divisors (2479394861).

13540204531 is a wasteful number, since it uses less digits than its factorization.

13540204531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11583 (or 11542 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The spelling of 13540204531 in words is "thirteen billion, five hundred forty million, two hundred four thousand, five hundred thirty-one".