12223451 has 4 divisors (see below), whose sum is σ = 12270192. Its totient is φ = 12176712.

The previous prime is 12223447. The next prime is 12223457. The reversal of 12223451 is 15432221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15432221 = 7 ⋅2204603.

It is a cyclic number.

It is not a de Polignac number, because 12223451 - 2² = 12223447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12223457) 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, 22976 + ... + 23501.

It is an arithmetic number, because the mean of its divisors is an integer number (3067548).

Almost surely, 2^12223451 is an apocalyptic number.

12223451 is a deficient number, since it is larger than the sum of its proper divisors (46741).

12223451 is an equidigital number, since it uses as much as digits as its factorization.

12223451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46740.

The product of its digits is 480, while the sum is 20.

The square root of 12223451 is about 3496.2052285299. The cubic root of 12223451 is about 230.3551601731.

Adding to 12223451 its reverse (15432221), we get a palindrome (27655672).

The spelling of 12223451 in words is "twelve million, two hundred twenty-three thousand, four hundred fifty-one".