13531013 has 4 divisors (see below), whose sum is σ = 13602048. Its totient is φ = 13459980.

The previous prime is 13530991. The next prime is 13531019. The reversal of 13531013 is 31013531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31013531 = 83 ⋅373657.

It is a cyclic number.

It is not a de Polignac number, because 13531013 - 2⁸ = 13530757 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13530982 and 13531000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13531019) 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, 35231 + ... + 35612.

It is an arithmetic number, because the mean of its divisors is an integer number (3400512).

Almost surely, 2^13531013 is an apocalyptic number.

It is an amenable number.

13531013 is a deficient number, since it is larger than the sum of its proper divisors (71035).

13531013 is an equidigital number, since it uses as much as digits as its factorization.

13531013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71034.

The product of its (nonzero) digits is 135, while the sum is 17.

The square root of 13531013 is about 3678.4525278981. The cubic root of 13531013 is about 238.2923519389.

Adding to 13531013 its reverse (31013531), we get a palindrome (44544544).

The spelling of 13531013 in words is "thirteen million, five hundred thirty-one thousand, thirteen".