13266531 has 8 divisors (see below), whose sum is σ = 19654160. Its totient is φ = 8844336.

The previous prime is 13266529. The next prime is 13266551. The reversal of 13266531 is 13566231.

13266531 is a `hidden beast` number, since 1 + 3 + 2 + 6 + 653 + 1 = 666.

It is not a de Polignac number, because 13266531 - 2¹ = 13266529 is a prime.

It is a super-2 number, since 2×13266531² = 352001689547922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 491353 = 13266531 / (1 + 3 + 2 + 6 + 6 + 5 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13266495 and 13266504.

It is not an unprimeable number, because it can be changed into a prime (13266551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 245650 + ... + 245703.

It is an arithmetic number, because the mean of its divisors is an integer number (2456770).

Almost surely, 2^13266531 is an apocalyptic number.

13266531 is a deficient number, since it is larger than the sum of its proper divisors (6387629).

13266531 is an equidigital number, since it uses as much as digits as its factorization.

13266531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491362 (or 491356 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 13266531 is about 3642.3249443178. The cubic root of 13266531 is about 236.7295424645.

The spelling of 13266531 in words is "thirteen million, two hundred sixty-six thousand, five hundred thirty-one".