13066531 has 4 divisors (see below), whose sum is σ = 13488064. Its totient is φ = 12645000.

The previous prime is 13066499. The next prime is 13066549. The reversal of 13066531 is 13566031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13566031 = 109 ⋅124459.

It is a cyclic number.

It is not a de Polignac number, because 13066531 - 2⁵ = 13066499 is a prime.

It is a super-2 number, since 2×13066531² = 341468464747922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13066496 and 13066505.

It is not an unprimeable number, because it can be changed into a prime (13066831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210720 + ... + 210781.

It is an arithmetic number, because the mean of its divisors is an integer number (3372016).

Almost surely, 2^13066531 is an apocalyptic number.

13066531 is a deficient number, since it is larger than the sum of its proper divisors (421533).

13066531 is an equidigital number, since it uses as much as digits as its factorization.

13066531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421532.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 13066531 is about 3614.7656908851. The cubic root of 13066531 is about 235.5339060423.

Subtracting 13066531 from its reverse (13566031), we obtain a triangular number (499500 = T₉₉₉).

The spelling of 13066531 in words is "thirteen million, sixty-six thousand, five hundred thirty-one".