13043513531 has 4 divisors (see below), whose sum is σ = 13464272064. Its totient is φ = 12622755000.

The previous prime is 13043513507. The next prime is 13043513543. The reversal of 13043513531 is 13531534031.

13043513531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13531534031 = 421 ⋅32141411.

It is a cyclic number.

It is not a de Polignac number, because 13043513531 - 2¹⁴ = 13043497147 is a prime.

It is a super-2 number, since 2×13043513531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13043513494 and 13043513503.

It is not an unprimeable number, because it can be changed into a prime (13043513501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210379220 + ... + 210379281.

It is an arithmetic number, because the mean of its divisors is an integer number (3366068016).

Almost surely, 2^13043513531 is an apocalyptic number.

13043513531 is a deficient number, since it is larger than the sum of its proper divisors (420758533).

13043513531 is an equidigital number, since it uses as much as digits as its factorization.

13043513531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420758532.

The product of its (nonzero) digits is 8100, while the sum is 29.

The spelling of 13043513531 in words is "thirteen billion, forty-three million, five hundred thirteen thousand, five hundred thirty-one".