13318651 has 4 divisors (see below), whose sum is σ = 13340992. Its totient is φ = 13296312.

The previous prime is 13318649. The next prime is 13318661. The reversal of 13318651 is 15681331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13318651 - 2¹ = 13318649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13318661) 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, 10251 + ... + 11476.

It is an arithmetic number, because the mean of its divisors is an integer number (3335248).

Almost surely, 2^13318651 is an apocalyptic number.

13318651 is a deficient number, since it is larger than the sum of its proper divisors (22341).

13318651 is an equidigital number, since it uses as much as digits as its factorization.

13318651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22340.

The product of its digits is 2160, while the sum is 28.

The square root of 13318651 is about 3649.4727016379. The cubic root of 13318651 is about 237.0391491761.

Adding to 13318651 its reverse (15681331), we get a palindrome (28999982).

The spelling of 13318651 in words is "thirteen million, three hundred eighteen thousand, six hundred fifty-one".