13504240531 has 4 divisors (see below), whose sum is σ = 13556786472. Its totient is φ = 13451694592.

The previous prime is 13504240511. The next prime is 13504240579.

13504240531 is nontrivially palindromic in base 10.

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 13504240531 - 2⁵ = 13504240499 is a prime.

It is a super-2 number, since 2×13504240531² (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 13504240531.

It is not an unprimeable number, because it can be changed into a prime (13504240511) 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, 26272585 + ... + 26273098.

It is an arithmetic number, because the mean of its divisors is an integer number (3389196618).

Almost surely, 2^13504240531 is an apocalyptic number.

13504240531 is a deficient number, since it is larger than the sum of its proper divisors (52545941).

13504240531 is an equidigital number, since it uses as much as digits as its factorization.

13504240531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52545940.

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

The spelling of 13504240531 in words is "thirteen billion, five hundred four million, two hundred forty thousand, five hundred thirty-one".