12225243651 has 4 divisors (see below), whose sum is σ = 16300324872. Its totient is φ = 8150162432.

The previous prime is 12225243637. The next prime is 12225243671. The reversal of 12225243651 is 15634252221.

It is a happy number.

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 12225243651 - 2⁷ = 12225243523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12225243671) 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, 2037540606 + ... + 2037540611.

It is an arithmetic number, because the mean of its divisors is an integer number (4075081218).

Almost surely, 2^12225243651 is an apocalyptic number.

12225243651 is a deficient number, since it is larger than the sum of its proper divisors (4075081221).

12225243651 is an equidigital number, since it uses as much as digits as its factorization.

12225243651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4075081220.

The product of its digits is 28800, while the sum is 33.

Adding to 12225243651 its reverse (15634252221), we get a palindrome (27859495872).

The spelling of 12225243651 in words is "twelve billion, two hundred twenty-five million, two hundred forty-three thousand, six hundred fifty-one".