12227513 has 4 divisors (see below), whose sum is σ = 12759168. Its totient is φ = 11695860.

The previous prime is 12227489. The next prime is 12227521. The reversal of 12227513 is 31572221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12227513 - 2¹² = 12223417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 531631 = 12227513 / (1 + 2 + 2 + 2 + 7 + 5 + 1 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12227533) 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, 265793 + ... + 265838.

It is an arithmetic number, because the mean of its divisors is an integer number (3189792).

Almost surely, 2^12227513 is an apocalyptic number.

It is an amenable number.

12227513 is a deficient number, since it is larger than the sum of its proper divisors (531655).

12227513 is an equidigital number, since it uses as much as digits as its factorization.

12227513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531654.

The product of its digits is 840, while the sum is 23.

The square root of 12227513 is about 3496.7860958314. The cubic root of 12227513 is about 230.3806739452.

Adding to 12227513 its reverse (31572221), we get a palindrome (43799734).

The spelling of 12227513 in words is "twelve million, two hundred twenty-seven thousand, five hundred thirteen".