22024421 has 4 divisors (see below), whose sum is σ = 22561644. Its totient is φ = 21487200.

The previous prime is 22024399. The next prime is 22024423. The reversal of 22024421 is 12442022.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2927521 + 19096900 = 1711^2 + 4370^2 .

It is a cyclic number.

It is not a de Polignac number, because 22024421 - 2¹⁴ = 22008037 is a prime.

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 22024421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22024423) 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, 268550 + ... + 268631.

It is an arithmetic number, because the mean of its divisors is an integer number (5640411).

Almost surely, 2^22024421 is an apocalyptic number.

It is an amenable number.

22024421 is a deficient number, since it is larger than the sum of its proper divisors (537223).

22024421 is an equidigital number, since it uses as much as digits as its factorization.

22024421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537222.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 22024421 is about 4693.0183251294. The cubic root of 22024421 is about 280.3075744269.

Adding to 22024421 its reverse (12442022), we get a palindrome (34466443).

The spelling of 22024421 in words is "twenty-two million, twenty-four thousand, four hundred twenty-one".