13224251 has 4 divisors (see below), whose sum is σ = 13441104. Its totient is φ = 13007400.

The previous prime is 13224227. The next prime is 13224269. The reversal of 13224251 is 15242231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15242231 = 113 ⋅134887.

It is a cyclic number.

It is not a de Polignac number, because 13224251 - 2⁶ = 13224187 is a prime.

It is a super-2 number, since 2×13224251² = 349761629022002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13224221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108335 + ... + 108456.

It is an arithmetic number, because the mean of its divisors is an integer number (3360276).

Almost surely, 2^13224251 is an apocalyptic number.

13224251 is a deficient number, since it is larger than the sum of its proper divisors (216853).

13224251 is an equidigital number, since it uses as much as digits as its factorization.

13224251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216852.

The product of its digits is 480, while the sum is 20.

The square root of 13224251 is about 3636.5163274761. The cubic root of 13224251 is about 236.4777917336.

Adding to 13224251 its reverse (15242231), we get a palindrome (28466482).

The spelling of 13224251 in words is "thirteen million, two hundred twenty-four thousand, two hundred fifty-one".