12225813 has 4 divisors (see below), whose sum is σ = 16301088. Its totient is φ = 8150540.

The previous prime is 12225779. The next prime is 12225823. The reversal of 12225813 is 31852221.

12225813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12225813 - 2¹⁴ = 12209429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12225823) 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, 2037633 + ... + 2037638.

It is an arithmetic number, because the mean of its divisors is an integer number (4075272).

Almost surely, 2^12225813 is an apocalyptic number.

It is an amenable number.

12225813 is a deficient number, since it is larger than the sum of its proper divisors (4075275).

12225813 is an equidigital number, since it uses as much as digits as its factorization.

12225813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4075274.

The product of its digits is 960, while the sum is 24.

The square root of 12225813 is about 3496.5430070285. The cubic root of 12225813 is about 230.3699967863.

The spelling of 12225813 in words is "twelve million, two hundred twenty-five thousand, eight hundred thirteen".