12317551 has 4 divisors (see below), whose sum is σ = 12346432. Its totient is φ = 12288672.

The previous prime is 12317531. The next prime is 12317563. The reversal of 12317551 is 15571321.

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 12317551 - 2⁷ = 12317423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12317531) 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, 13791 + ... + 14656.

It is an arithmetic number, because the mean of its divisors is an integer number (3086608).

Almost surely, 2^12317551 is an apocalyptic number.

12317551 is a deficient number, since it is larger than the sum of its proper divisors (28881).

12317551 is an equidigital number, since it uses as much as digits as its factorization.

12317551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28880.

The product of its digits is 1050, while the sum is 25.

The square root of 12317551 is about 3509.6368758035. The cubic root of 12317551 is about 230.9447654400.

Adding to 12317551 its reverse (15571321), we get a palindrome (27888872).

The spelling of 12317551 in words is "twelve million, three hundred seventeen thousand, five hundred fifty-one".