22224451 has 4 divisors (see below), whose sum is σ = 22260304. Its totient is φ = 22188600.

The previous prime is 22224443. The next prime is 22224481. The reversal of 22224451 is 15442222.

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 22224451 - 2³ = 22224443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22224401) 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, 16980 + ... + 18241.

It is an arithmetic number, because the mean of its divisors is an integer number (5565076).

Almost surely, 2^22224451 is an apocalyptic number.

22224451 is a deficient number, since it is larger than the sum of its proper divisors (35853).

22224451 is an equidigital number, since it uses as much as digits as its factorization.

22224451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35852.

The product of its digits is 1280, while the sum is 22.

The square root of 22224451 is about 4714.2815995653. The cubic root of 22224451 is about 281.1536205729.

Adding to 22224451 its reverse (15442222), we get a palindrome (37666673).

The spelling of 22224451 in words is "twenty-two million, two hundred twenty-four thousand, four hundred fifty-one".