13000531 has 4 divisors (see below), whose sum is σ = 13094200. Its totient is φ = 12906864.

The previous prime is 13000511. The next prime is 13000553. The reversal of 13000531 is 13500031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13500031 = 67 ⋅201493.

It is a cyclic number.

It is not a de Polignac number, because 13000531 - 2⁵ = 13000499 is a prime.

It is a super-2 number, since 2×13000531² = 338027612563922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13000511) 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, 46626 + ... + 46903.

It is an arithmetic number, because the mean of its divisors is an integer number (3273550).

Almost surely, 2^13000531 is an apocalyptic number.

13000531 is a deficient number, since it is larger than the sum of its proper divisors (93669).

13000531 is an equidigital number, since it uses as much as digits as its factorization.

13000531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93668.

The product of its (nonzero) digits is 45, while the sum is 13.

The square root of 13000531 is about 3605.6249111631. The cubic root of 13000531 is about 235.1366701611.

Adding to 13000531 its reverse (13500031), we get a palindrome (26500562).

Subtracting 13000531 from its reverse (13500031), we obtain a triangular number (499500 = T₉₉₉).

It can be divided in two parts, 13000 and 531, that added together give a palindrome (13531).

The spelling of 13000531 in words is "thirteen million, five hundred thirty-one", and thus it is an aban number.