12225151 has 4 divisors (see below), whose sum is σ = 12868600. Its totient is φ = 11581704.

The previous prime is 12225149. The next prime is 12225179. The reversal of 12225151 is 15152221.

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 12225151 - 2¹ = 12225149 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 643429 = 12225151 / (1 + 2 + 2 + 2 + 5 + 1 + 5 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12225251) 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, 321696 + ... + 321733.

It is an arithmetic number, because the mean of its divisors is an integer number (3217150).

Almost surely, 2^12225151 is an apocalyptic number.

12225151 is a deficient number, since it is larger than the sum of its proper divisors (643449).

12225151 is an equidigital number, since it uses as much as digits as its factorization.

12225151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643448.

The product of its digits is 200, while the sum is 19.

The square root of 12225151 is about 3496.4483408167. The cubic root of 12225151 is about 230.3658387073.

Adding to 12225151 its reverse (15152221), we get a palindrome (27377372).

The spelling of 12225151 in words is "twelve million, two hundred twenty-five thousand, one hundred fifty-one".