13140531 has 6 divisors (see below), whose sum is σ = 18980780. Its totient is φ = 8760348.

The previous prime is 13140529. The next prime is 13140551. The reversal of 13140531 is 13504131.

13140531 is a `hidden beast` number, since 131 + 4 + 0 + 531 = 666.

13140531 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13140531 - 2¹ = 13140529 is a prime.

It is a super-2 number, since 2×13140531² = 345347109923922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13140551) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 730021 + ... + 730038.

Almost surely, 2^13140531 is an apocalyptic number.

13140531 is a deficient number, since it is larger than the sum of its proper divisors (5840249).

13140531 is a wasteful number, since it uses less digits than its factorization.

13140531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1460065 (or 1460062 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 13140531 is about 3624.9870344596. The cubic root of 13140531 is about 235.9777042520.

Adding to 13140531 its reverse (13504131), we get a palindrome (26644662).

The spelling of 13140531 in words is "thirteen million, one hundred forty thousand, five hundred thirty-one".