12225513 has 4 divisors (see below), whose sum is σ = 16300688. Its totient is φ = 8150340.

The previous prime is 12225491. The next prime is 12225527. The reversal of 12225513 is 31552221.

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 not a de Polignac number, because 12225513 - 2¹⁶ = 12159977 is a prime.

It is a super-2 number, since 2×12225513² = 298926336226338, which contains 22 as substring.

It is the 3497-th Hogben number.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12225513.

It is not an unprimeable number, because it can be changed into a prime (12225553) by changing a digit.

It is a nontrivial repunit in base 3496.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2037583 + ... + 2037588.

It is an arithmetic number, because the mean of its divisors is an integer number (4075172).

Almost surely, 2^12225513 is an apocalyptic number.

It is an amenable number.

12225513 is a deficient number, since it is larger than the sum of its proper divisors (4075175).

12225513 is an equidigital number, since it uses as much as digits as its factorization.

12225513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4075174.

The product of its digits is 600, while the sum is 21.

The square root of 12225513 is about 3496.5001072501. The cubic root of 12225513 is about 230.3681124791.

Adding to 12225513 its reverse (31552221), we get a palindrome (43777734).

The spelling of 12225513 in words is "twelve million, two hundred twenty-five thousand, five hundred thirteen".