13312511 has 4 divisors (see below), whose sum is σ = 13352352. Its totient is φ = 13272672.

The previous prime is 13312493. The next prime is 13312517. The reversal of 13312511 is 11521331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11521331 = 2281 ⋅5051.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13312511 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 13312511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13312517) 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, 19415 + ... + 20088.

It is an arithmetic number, because the mean of its divisors is an integer number (3338088).

Almost surely, 2^13312511 is an apocalyptic number.

13312511 is a deficient number, since it is larger than the sum of its proper divisors (39841).

13312511 is an equidigital number, since it uses as much as digits as its factorization.

13312511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39840.

The product of its digits is 90, while the sum is 17.

The square root of 13312511 is about 3648.6313872465. The cubic root of 13312511 is about 237.0027179568.

Adding to 13312511 its reverse (11521331), we get a palindrome (24833842).

The spelling of 13312511 in words is "thirteen million, three hundred twelve thousand, five hundred eleven".